you can use a backport tool, but there's a lot it won't cover. they're based on flatz script. anything that utilizes a higher sdk's features+, probably won't work properly. the game will likely crash. to make a true backport, you need to use IDA or ghidra, but explaining those would take months probably. your other option is to download backports made by someone else. I've heard from Joonie that backports are usually not completely stable, since we're making minor changes to code that may or may not work in the long run, so take that as you see it. I'm on 5.05 as well, but I don't play my ps4 at all. I don't know if there may be issues with any backported game. for all we know, people who release backports just test if the game boots, and that's it.
i always do hours of research before i buy anything because half the crap you see gets bad reviews especially when it's on sale, stuff is usually on sale because it was a bad deal at full price and nobody was buying it