I can't seem to sync with the biocontainer while regenerating I've pressed the force regeneration button and even remapped it but to no avail unless I'm supposed to add something to the container besides the arm then I'm at a lost

Thanks for making me aware of this, I think this may be due to handling inputs really badly
I will be fixing this later today

Should be fixed in 877d6e2

You can download this update here: https://www.curseforge.com/minecraft/mc-mods/regeneration/files/2766859