Well I'm not in the lockerroom, but I don't believe it to be true.
From all accounts, Tuchel has a love affair with the players. They love him and he loves them too.
There is clearly a power struggle between Tuchel and Henrique though and Nasser HAS to make a decision there. It's not as if Henrique had done some wonderful signings either. Mind you, Tuchel hasn't lit it up this year either.
Frankly, since Leonardo left, the lack of transfer direction has hurt the team.
And Blanc should have never been fired IMO.
With that said, Nasser could also be the one fired.
I expect a summer of change. One of Tuchel and Henrique has to go (Tuchel has rejected two offers lately before signing a new contract). Nasser might be sent packing. And of course, plenty of players will find new homes : Meunier, possibly Alves, possibly one or both goalies, possibly Thiago Silva (who quietly had a monster season), Kurzawa, Draxler, Rabiot of course, possibly Di Maria, but also some youngsters (I hear Nkunku, Diaby and even Mbe Soh and Zagre, which is once again baffling).
Tuchel is asking for 22 competitive players, which is fair for a team looking to challenge for the CL. But again, FFP will limit their market (they have to sell for 60M before end of june, but Lo Celso, Krychowiak, Jese and Meunier will easily fill that).