Yeah I think I’ll probably stick with the whole “Rey is Palpatine’s daughter” thingy (in biological terms).
But what makes you say that about Unkar? They were leaving the planet and didn’t want to take her with them. Then Ochi tracks them down, reclaims his ship, tells Rey’s dad he is never leaving Exegol again, and then demands to know where Rey is. I’d remove Rey’s mother mentioning Jakku. Therefore, as far as Ochi knows, they were never on Jakku.