Golarion is a high magic setting, and that’s reflected in PF2s rules for magic items. Unlike in 5e, where magic items are often wondrous and a little bit game breaking, they’re expected to fit within the players’ power curves.
But there’s such an incredible depth of magic items made for 5e (and older editions, of course), that porting them to PF2 is always a temptation.
So, how do you go about doing it? How do you make sure they’re balanced? How do you translate their effects? What requires investment? What’s better off as a Relic? How do you handle Trick Magic Item? And how do you measure the impact at the table?
I believe there are rules for creating custom magic items in the GM Core rulebook
There are, but they don’t really provide great insight on porting existing artifacts over. Usually if you’re digging through stuff made without the game in mind, you’re not wanting to do a full rebuild. The game is lacking quick conversion guides