I am looking for first person shooter type games (that preferably have an active multi player base) for PS5. My preference is for more type RPG games with a lot of permanent upgrades for the weapon, character, skill, etc. The more focused on upgrade and specialization the better.
Excluding suggestions COD, Borderlands and Xdefiant.
I think the FarCry games meet all of your requirements (which means the Avatar game by Ubisoft probably would too)?
The Doom games also have an upgrade system (not sure if any released on PS5).