I don't know from where you got this information that CR7 will move out from ManU? That was speculated weeks ago but the situation was calm these days since it was unofficially said that he will remain in United and even his teammates announced that. Of course everything could change at the last minute but he won't join Real Madrid since I doubt they will accept him back for several reasons like his age, wage, the way he left the club, his actual performance... Bayern already got Mane so it is unlikely to grab an old player while keeping Lewandowski with them.
Actually, the other day I read the words of Manchester United midfielder Bruno Fernandes that he does not believe that Manchester United is ready to lose Ronaldo and hopes to meet him in pre-season. So, the main conclusion that I made is that Fernandes BELIEVES and HOPES that Ronaldo will stay in the team. At the same time, the players did not communicate on this issue and do not bother each other. But I didn't see anywhere that Ronaldo told his teammates that he was staying in the team. I think a lot will be decided when Ronaldo and Manchester United head coach Ten Hag meet in person and then it will be possible to wait for official statements on this matter.