
Plushies are crafted with an armor stand, string, wheat, and a pumpkin. The plushie will be of the skin you are wearing at the time you crafted it. If you have anything that lets you get player heads the player heads will be replaced by plushies.

Of course! Just don't claim that you made it and the modpack needs to be on curseforge.
1.20.1 will always be supported and I will try to port to newer versions but it's not a guaranteed. As for other modloaders, maybe.
You can report it in the bug reports channel in the support discord: https://discord.gg/T9cNptzn8z