Will there be support for this mod Fabric Forge in the future?

As it is currently, they work together with minimal issues:

3D Layer is not applied to the new model parts (understandably)
3D Layers shift backward with the "size" option, returning to no offset only at 100% size

Those are the only issues I've been able to find

3D Layers shift backward with the "size" option, returning to no offset only at 100% size that is fully intended. 1.0/100% is equal to the normal player model, so it is intended that there is no offset at that point. The issue I see is that I don't see any good way to make it visually better compatible with that mod. In the 1.16 version of the First Person mod(Fabric) I added multiplayer synced cosmetics and one of them is also a female player model, but there it fits kinda well since it uses cubes in a "vanilla" orientation. So yea, honestly not too sure 🤔

Gonna close this issue since it's not really doable. I hope I'll sooner or later get to rewrite the 1.16 First Person mod cosmetics part to be its own mod, and compatible with this mod.