I have a 2019 Mazda CX nine and I’m trying to take apart some of the front trim. A couple fasteners appear to have a triangular head. I ordered a special head that fits but the fastener seems to just twist and not come out. Anybody ever remove these?Just want to do it right without damaging a fastener. Pictures attached.

 

They are rivet's. They need to be drilled out, then replaced with new rivets upon re-assembly.