Great game! But unfortunately Save Wizard does not have official support for it yet. That means you can resign someone else's Alien Isolation saves, but there are no Save Wizard cheats to apply to your own Alien Isolation saves (meaning, no Quick Mode) and you cannot edit it in hex or re-region someone else's saves (meaning, no Advanced Mode).
Save Wizard adds support for games all the time, but they can't do that without user-supplied saves. Meaning, if you want them to add support for Alien Isolation, there is a form in the link below. Fill it out and make sure to include Alien Isolation saves!
https://www.savewizard.net/support/contact-us-game-request/
In the meantime, I don't know which region of the game you have but there is a EU save set for a few trophies (first link below) and a US platinum save. The platinum save was made after the uploader already had the platinum, meaning everything is already done, but it can be used to get the difficulty trophies by playing the last chapter or maybe any chapter on the hardest difficulty (except I think the no-dying trophy, but I might be wrong). You might also be able to get archivist by picking up a collectible (someone says "log 4" in one of the comments), plus the trophies that user counters, like for dying a certain number of times, etc. But make sure to resign each save in the US plat save for it to work as intended.
EDIT: Just saw you list your CUSA in your post, and it's the EU one. So check that thread out. Leaving up the US info and link in case it helps anyone else who comes looking here.
EU save set:
https://nextgenupdate.com/forums/ps4-trophies-game-saves/1023223-alien-isolation-save-set-cusa00362a.html
US platinum save:
https://nextgenupdate.com/forums/ps4-trophies-game-saves/1017262-alien-isolation-platinum-save-cusa00363a.html