Creating Multiple Symbols

You can add selection of multilpe objects to the graphics tab in the 3d Panel  and they will all be individual symbols in the Symbols Panel.

Here's the origial script posted in the missing link above. I hope this is the one.

// script.name = addStaticSymbols.jsx;
// script description = create Static Symbols out of selected Objects, Version 2 replaces selection with newly created symbol
// script.requirements = open document with one or more selected objects
// script.parent = CarlosCanto // 11/24/2017; v2 05/10/2018

function main() {
    try {var idoc = app.activeDocument;}
    catch (e) {alert ('Open a document and try again'); return };

    var sel = idoc.selection, a, newSymbol, instance;
    
    for (a=sel.length-1; a>=0; a--) {
        newSymbol = idoc.symbols.add(sel[a], SymbolRegistrationPoint.SYMBOLCENTERPOINT);
        try {
            newSymbol.name = sel[a].name;
        }
        catch (e) {}
        instance = idoc.symbolItems.add(newSymbol);
        instance.position = sel[a].position;
        sel[a].remove();
    }
}

main();

Hi Dany. Just drag the icons to the Assets export panel, define the export settings and click the Export button.