I hope this is the right place to post my question:
Can I take the Harrowing Ritual from Stolen Fate into a PF2 Remastered campaign as is? Or would something need to be changed in the rules text? I can't find any reference to this ritual in the Remastered books, so I'm not sure.
If you mean this, then nothing changed. It's still Pathfinder 2e. Skills, targets, durations, degrees of success, checks and ritual rules haven't changed.