UV mapping should be done without using Subdivision smoothing applied to the model.
I also thing you may be in the wrong place,..
This is the help for New users,.. just getting started.
from your pics I can see some minor distortion (bending) but I’m not entirely sure what you want to see, and therefore,.. what the issue is.
It could be a simple adjustment of some vertices in the UV room.
I take it this is in carrara. not hex ?
I’d really need to see the maps , the UV’s, and maybe some more info on what you want to get to.