In everything Liverpool want to do this summer, they can't ever afford to lose both Salah and Mane. Without those two, the club will struggle in the league. Salah and Mane are players that are difficult to replace. If they lose those two, then probably they have to change the strategy in order to get results.
Both players have helped Liverpool to success so far but it seems logical in the end that regeneration should be on Liverpool's mind as there comes a time when they too have to prioritize business over retaining certain players. Mane has been heavily linked with his future move to Bayern Munchen, but so far it is unclear whether negotiations are going well or not. The possibility of Mane moving to Bayern has reached 75%, but there has been no official announcement regarding the amount of the contract or the transfer fee.
PSG, Tottenham and Bayern Munich are reportedly interested in Mane, but I believe he may be getting closer to Bayern Munchen now. After all, Mane is a good player and one his team can rely on.