What to do about poa and funeral arrangements

I’m from Kansas, I want to make my mom power of attorney with my sister as a successor. My thing is I want cremated which my mom is okay with however my dad’s side of the family takes religion a lot more serious and being cremated is against. So my dad has stated that if I go first I’m not being cremated but I’m convinced he could potentially get my mom to agree with burial. Is there a way to ensure that I get cremated regardless of what my next of kin or POA want?