I agree with you because while Mane joined Bayern Munich in a few matches he could only get 6 goals.
But for the option that Mane will join Liverpool it seems there is still a good chance for him because before with Bayern Munich Mane with Liverpool could appear very stunning by scoring up to 90 goals
He failed to adapt to Bayern Munich system and he is not a traditional striker so forcing him to play at the position left by Lewandowski is challenging for him. When he was struggling to adapt to his new club, he got an injury and missed most of the season. Generally the first season in Bayern Munich is a nightmare for Mane from total appearances to his performance.
This will be a hero coming home if Mane decides to rejoin Liverpool.
He is like Neymar when Neymar decided to leave Barcelona because they both thought that they deserved to have a more important role and can win Ballon d'Or. Mane also reminds us about another player from Liverpool, Coutinho who left the club to join Barcelona then Bayern Munich but has never played well like he did in Liverpool.
He together with Salah and Firmino already are legends in Liverpool because they helped Liverpool to win a first Premier League after many decades.