I know that Ronaldo is older. But Ronaldo's fitness is still good enough. So it can be assumed that Ronaldo will be able to play well for at least the next two seasons. And right now, Bayern Munich's target is next season's Champions League title. Bayern Munich has already invested a lot of money in buying players for this. And so they will not rely solely on Sadio Mane to attack next season. They need another experienced player.
Even though this seems forced if it continues to be discussed considering the statements from MU and Ten Hag that will not let Ronaldo go and Bayern have refused to bring him to the Bundesliga but it seems that when Lewandowski leaves it is possible that this might still happen now.
The reason behind Bayern not wanting Ronaldo was Lewandowski but now Lewandowski is really leaving and it will be good to see how he develops.