The one question would be if Palpatine picked out Rey’s parents in particular, or Palpatine performed some ritual or whatever but didn’t know where his experiment ended up. I’m leaning towards the former, since Jakku kind of is a great environment to raise a survivor.
I think the latter would work well too. Then you could say that ochi was sent to get Rey, but never found her, only removing the dagger connection. It also explains why palpatine goes for Ben and leaves Rey alone on Jakku: he just doesn’t know where she is.