I'm playing with the mod and Optifine on version 1.20.1 of MC and using Forge as modloader. The armors display is glitched: the helmets appear glitched and the other parts of the armor straight up don't appear.

After testing it, the bug only happen if I'm using Optifine (version U I6 for Forge 47.2.18)

The bug is purely visual tho, as the armors still work.

Optifine is not supported for geckolib models.