If action for 1 person or 2 person

To perform an Action from a Script use 

app.doAction("actionname", "setname")

and replace actionname and setname with the names of the Action you want to run and the name of the set in which that Action resides. 

More than two persons would necessitate something different (edit: one could for example determine one face, fill that area, try to determine another face, fill that area etc. until no further faces can be located) but please give this a try: 

Edited code 2025-02-20

// determine how many persons can be identified in the image;
// 2025, use it at your own risk;
if (app.documents.length > 0) {
var originalRulerUnits = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
app.togglePalettes();
var theCopy = activeDocument.duplicate("theCopy", true);
var theLayer = theCopy.layers[0];
////////////////////////////////////
var theCheck = true;
var theCounter = 0;
while (theCheck == true) {
try {
var newLayer = theCopy.activeLayer.duplicate();
theCopy.activeLayer = newLayer;
facialLiquify01 ();
newLayer.blendMode = BlendMode.DIFFERENCE;
mergVisibleToNewLayer ();
var newerLayer = theCopy.activeLayer;
applyThreshold(1);
newerLayer.applyMaximum(30);
useMagicWand2022([1,1]);
theCopy.selection.invert();
makeWorkPath(0);
var thePath = theCopy.pathItems[theCopy.pathItems.length-1];
thePath.name = "face_"+String(theCounter);
theCounter++;
newerLayer.remove();
newLayer.remove();
thePath.makeSelection(0, false, SelectionType.REPLACE);
thePath.deselect();
theCopy.selection.fill(app.foregroundColor);
theCopy.selection.deselect();
} catch (e) {theCheck = false}
};
////////////////////////////////////
theCopy.close(SaveOptions.DONOTSAVECHANGES);
if (theCounter == 1) {alert (theCounter+" person")}
else {alert (theCounter+" persons")};
// reset;
app.preferences.rulerUnits = originalRulerUnits;
app.togglePalettes();
};
////// face liquify //////
function facialLiquify01 () {
// =======================================================
var idLqFy = charIDToTypeID( "LqFy" );
    var desc225 = new ActionDescriptor();
    var idLqMe = charIDToTypeID( "LqMe" );
    var idfaceMeshData = stringIDToTypeID( "faceMeshData" );
    desc225.putData( idfaceMeshData, String.fromCharCode( 0, 0, 0, 16, 0, 0, 0, 1, 0, 0, 0, 0, 0, 8, 102, 97, 99, 101, 77, 101, 115, 104, 0, 0, 0, 3, 0, 0, 0, 21, 102, 97, 
99, 101, 68, 101, 115, 99, 114, 105, 112, 116, 111, 114, 86, 101, 114, 115, 105, 111, 110, 108, 111, 110, 103, 0, 0, 0, 2, 0, 0, 0, 15, 102, 
97, 99, 101, 77, 101, 115, 104, 86, 101, 114, 115, 105, 111, 110, 108, 111, 110, 103, 0, 0, 0, 2, 0, 0, 0, 12, 102, 97, 99, 101, 73, 110, 
102, 111, 76, 105, 115, 116, 86, 108, 76, 115, 0, 0, 0, 1, 79, 98, 106, 99, 0, 0, 0, 1, 0, 0, 0, 0, 0, 8, 102, 97, 99, 101, 
73, 110, 102, 111, 0, 0, 0, 3, 0, 0, 0, 10, 102, 97, 99, 101, 67, 101, 110, 116, 101, 114, 79, 98, 106, 99, 0, 0, 0, 1, 0, 0, 
0, 0, 0, 0, 110, 117, 108, 108, 0, 0, 0, 2, 0, 0, 0, 0, 88, 32, 32, 32, 100, 111, 117, 98, 63, 228, 159, 82, 77, 210, 241, 170, 
0, 0, 0, 0, 89, 32, 32, 32, 100, 111, 117, 98, 63, 201, 108, 29, 90, 203, 111, 70, 0, 0, 0, 13, 102, 101, 97, 116, 117, 114, 101, 86, 
97, 108, 117, 101, 115, 79, 98, 106, 99, 0, 0, 0, 1, 0, 0, 0, 0, 0, 13, 102, 101, 97, 116, 117, 114, 101, 86, 97, 108, 117, 101, 115, 
0, 0, 0, 4, 0, 0, 0, 9, 102, 97, 99, 101, 87, 105, 100, 116, 104, 100, 111, 117, 98, 191, 240, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
10, 99, 104, 105, 110, 72, 101, 105, 103, 104, 116, 100, 111, 117, 98, 191, 240, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 106, 97, 119, 83, 104, 
97, 112, 101, 100, 111, 117, 98, 191, 240, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14, 102, 111, 114, 101, 104, 101, 97, 100, 72, 101, 105, 103, 104, 
116, 100, 111, 117, 98, 191, 240, 0, 0, 0, 0, 0, 0, 0, 0, 0, 20, 102, 101, 97, 116, 117, 114, 101, 68, 105, 115, 112, 108, 97, 99, 101, 
109, 101, 110, 116, 115, 79, 98, 106, 99, 0, 0, 0, 1, 0, 0, 0, 0, 0, 20, 102, 101, 97, 116, 117, 114, 101, 68, 105, 115, 112, 108, 97, 
99, 101, 109, 101, 110, 116, 115, 0, 0, 0, 0 ) );
executeAction( idLqFy, desc225, DialogModes.NO );
};
////// make work path from selection //////
function makeWorkPath (theTolerance) {
// =======================================================
var idMk = charIDToTypeID( "Mk  " );
var desc5 = new ActionDescriptor();
var idnull = charIDToTypeID( "null" );
var ref3 = new ActionReference();
var idPath = charIDToTypeID( "Path" );
ref3.putClass( idPath );
desc5.putReference( idnull, ref3 );
var idFrom = charIDToTypeID( "From" );
var ref4 = new ActionReference();
var idcsel = charIDToTypeID( "csel" );
var idfsel = charIDToTypeID( "fsel" );
ref4.putProperty( idcsel, idfsel );
desc5.putReference( idFrom, ref4 );
var idTlrn = charIDToTypeID( "Tlrn" );
var idPxl = charIDToTypeID( "#Pxl" );
desc5.putUnitDouble( idTlrn, idPxl, theTolerance );
executeAction( idMk, desc5, DialogModes.NO );
/// get index;
var ref = new ActionReference();
ref.putProperty(stringIDToTypeID("property"), stringIDToTypeID("itemIndex"));
ref.putEnumerated( charIDToTypeID("Path"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
var pathDesc = executeActionGet(ref);
// return index;
return pathDesc.getInteger(stringIDToTypeID("itemIndex"))
};
////// use magic wand tool //////
function useMagicWand2022 (theCoord) {
var idnull = charIDToTypeID( "null" );
var idPxl = charIDToTypeID( "#Pxl" );
// select tool;
var desc2 = new ActionDescriptor();
var ref2 = new ActionReference();
ref2.putClass( stringIDToTypeID( "magicWandTool" ) );
desc2.putReference( idnull, ref2 );
desc2.putBoolean( stringIDToTypeID( "dontRecord" ), true );
desc2.putBoolean( stringIDToTypeID( "forceNotify" ), true );
executeAction( charIDToTypeID( "slct" ), desc2, DialogModes.NO );
// apply tool;
var desc2 = new ActionDescriptor();
var ref2 = new ActionReference();
ref2.putProperty( charIDToTypeID( "Chnl" ), charIDToTypeID( "fsel" ) );
desc2.putReference( idnull, ref2 );
var desc3 = new ActionDescriptor();
desc3.putUnitDouble( charIDToTypeID( "Hrzn" ), idPxl, theCoord[0] );
desc3.putUnitDouble( charIDToTypeID( "Vrtc" ), idPxl, theCoord[1] );
desc2.putObject( charIDToTypeID( "T   " ), charIDToTypeID( "Pnt " ), desc3 );
desc2.putInteger( charIDToTypeID( "Tlrn" ), 30 );
desc2.putBoolean( charIDToTypeID( "AntA" ), true );
desc2.putBoolean( stringIDToTypeID("merged"), true);
executeAction( charIDToTypeID( "setd" ), desc2, DialogModes.NO );
};
////// layer via copy //////
function mergVisibleToNewLayer (){
var desc23 = new ActionDescriptor();
desc23.putBoolean( stringIDToTypeID( "duplicate" ), true );
executeAction( stringIDToTypeID( "mergeVisible" ), desc23, DialogModes.NO );
};
////// apply threshold //////
function applyThreshold (theValue) {
var desc232 = new ActionDescriptor();
desc232.putInteger( stringIDToTypeID( "level" ), theValue );
executeAction( stringIDToTypeID( "thresholdClassEvent" ), desc232, DialogModes.NO );
};

I think @jazz-y utilized Liquify