An issue specific to Sony, having separate Trophy lists for the same game creates confusion and causes issues when comparing Trophy lists to overseas players for certain titles. It also won't make sense especially if other suggestions are implemented. If rewards are implemented they will be the same across both lists and become redundant on the second playthrough. If players are allowed to delete their Trophy progress then there is no reason to have a duplicate list as if a player wants to earn all the Trophies a second time they no longer need to do it on a secondary profile or a separate regional list.
Also it just looks bad from a completionist/perfectionist viewpoint. For example Skyrim has 4 separate yet identical sets of Trophy lists, for PS3, PS4, PS4 VR and PS5. If someone accidentally upgrades their version or acquires a special edition copy, they are now stuck with a fragmented implementation. I also believe remasters/remakes should be a sub-list in the original game like how DLC is handled on the Playstation.