Mane has already decided to leave Liverpool, but not whether to join Bayern

Sadio Mane will leave Liverpool this summer. He said some words after the Champions League final that sounded like a farewell and Fabrizio Romano, a journalist specialised in the transfer market, indicates through his social networks that what it seems to be, indeed, is: he will change team for next season.
The favourites are Bayern Munich, but nothing is set in stone yet. That means there is still scope for a bid to be made for the striker, who has been in fine form at Anfield since joining them in 2016. At the time, he had been playing very well for Southampton, which suggested he was well adapted to the Premier League.
Another club that has been rumoured to be interested in signing the winger is Real Madrid, who experienced a disappointment in the offices earlier this month when Kylian Mbappe announced that he was renewing his contract with PSG. However, the Spaniards made up for any possible bad news by lifting the UCL title and with plenty of budgetary leeway to aim for it again in 22-23.
That's where Sadio Mane comes in, who is contracted to Liverpool until 2023, so he will have to wait for his club to reach an agreement with another team. In principle, it doesn't look like there will be any problems with that, as he has earned a prestigious status in the English team that should be enough to grant him a sweet exit.