As for Palpatine not knowing about Rey, I see that to be a little convoluted. Clearly her parents have been in hiding for however old she is in years plus a couple extra years, so why would he wait all that time to track them down?

The sequence of events I’m thinking of is that Rey’s father escapes Exegol by hijacking the Bestoon Legacy, he flies to Jakku (which is right next to the Unknown Regions) where he meets Rey’s mom. They leave Rey there, flying off in the Legacy. Ochi is sent after them to find Rey, and also to retrieve his ship back.