there's an issue on the 1.20.1 version of origins where when you select an origin that changes your POV (i.e. pixie or dwarf), the pov doesn't change/reflect on the size of the playermodel.

Sorry I mistook it for this mod，I added pehkui in ATM9 and mod loading but commands not working in forge.

This is not a base Origins Forge feature.

You're likely using Pehkui (a library) for the size changing. Would you mind if you send me the data pack, I have a suspicion as to why it might not work.