Different fonts in the same text layer

I would use two different text layers with different fonts each. the short answer would be:
write these lines on the X axis (separating the dimensions)

var xPos = thisComp.layer("2023").transform.xPosition;
var theWidth = thisComp.layer("2023").sourceRectAtTime().width;

xPos + theWidth

This will place the layers close together, if you want to leave a space between them you can add a slider to each one and give them a space individually

var xPos = thisComp.layer("2023").transform.xPosition;
var theWidth = thisComp.layer("2023").sourceRectAtTime().width;
var thePadding = effect("padding")("Slider");

xPos + theWidth + thePadding

If you want to automate it a little more you can change thisComp.layer("2023") with the code thisComp.layer(thisLayer, 1) so that it detects the position and width of a layer below, when you duplicate them it will position itself automatically.

So this would be my final lines

var xPos = thisComp.layer(thisLayer, 1).transform.xPosition;
var theWidth = thisComp.layer(thisLayer, 1).sourceRectAtTime().width;
var thePadding = effect("padding")("Slider");

xPos + theWidth + thePadding

I hope this helps