In my opinion, it's a rumor that will never come true, so just ignore it.
Ronaldo will not return to Manchester United just to prove that Ten Hag is a coach who has made mistakes in his career. He didn't have a great season with Ten Hag and that can't be denied, but Ronaldo is a great player. In the SPL, Ronaldo shone and he seemed happy to be there instead of returning to Europe.
I have the same opinion as you about the Cr7 and Man United news. Well, it's just a rumor and it's better if we ignore it because I also feel that Cr7 will not return to a European club. I think he wants to spend his last years as a football player here at Al-nassr. Because I think Cr7 is currently quite satisfied with just playing for Al-Nassr and defending the Portuguese national team. In fact, the news I heard was that Cr7 sometimes invites other star players to come to Arab clubs, especially Al-Nassr. Although maybe it's just a rumor, I'm sure there will be more European star players coming here.