I also noticed that several years ago pants makers made the pockets shallower. I’ve been looking for a while to find pants with deeper pockets as well. I think part of the problem is they used to make “Long Rise” pants that were 1-2” deeper between the navel and crotch. That made 1-2” ;less room for pockets so the pockets are.now shallower. Now Long Rise pants are what was normal and they no longer make them even if they are labeled as Long Rise.