Need help with changing geckolib entity's parts

Hi there, I am making mod for me and my friends that is basing on multiple subnautica mechanics, I have added most of the things I need but I've got stuck on making a PRAWN Suit styled vehicle, the arm changing to be precise. The textures for them are done. Is there a way to implement that kind of mechanic, and if yes, then how? I'd really appreciate any help.