Lewandowski is already one of the most rumoured players these days. This must be about the gossips about him to leave even in the transfer window last summer. He still has a contract with Bayern Munich running until the summer of 2023 now. It is still early to talk about a probable transfer for him this summer. But if he doesn't extend his contract until that time, then I will start believing that he would leave the team before the next season. But his next station may not be Real Madrid if they sign Haaland.
With Lewandowski three seasons hot form and compared to the recent award of his, he is the man of the moment. Again for him not to extend his contract by now is a signal that might likely exit the club.
Honestly, if I were Lewandowski, I would have stopped and remained in Bayern. Be very loyal and become a renowned legend of the club.
In the world of football now, no where is sage.
It is better you remain where you are a king and where you are worshipped.
If he is to exit, anything that is not Real Madrid might not be considered fit to harbour Lewandowski(personal opinion)