If christiano move to Bayern Munich their is no way Bayern Munich won't have a chance of winning UCL. Bayern have good players that are capable of winning UCL in the next season. Christiano Ronaldo will Really be good good for Bayern if he come to Bayern Munich.
Even Bayern Munich's current squad is qualified enough to win the Champions League title. But they haven't been able to do this often in the recent years. It doesn't seem like Lewandowski's place would be filled with Ronaldo for now as they don't seem to be interested in him currently. I even started to think that Lewandowski won't leave now that easy. Let's say he left and Ronaldo joined the team somehow then I won't see their chance to win the Champions League title bigger. It would be the same I think.
I agree with your opinion, that the arrival of Ronaldo to replace Lewandowski will not increase Bayern's chances of winning the Champions League
trophy. Because after all football requires good teamwork to be able to win trophies, so can't just rely on star players. After all, Ronaldo's salary is
very high, so it will be a big burden for Bayern. Therefore Bayern have also said several times they are not interested in signing Ronaldo. Rumors
linking Ronaldo to Bayern started because of Ronaldo's dissatisfaction with Man United's current transfer activity. But if Erik ten Hag manages to
bring in new players, I'm sure Ronaldo will decide to play at Man United until his contract expires. Then for Bayern they seem to be more focused on
being able to keep Lewandowski rather than finding a replacement for Lewandowski.