It's true as you said if he is 27 years old and I think he has 3 years left for him to show his best performance in football, because I think if a football player is over the age of 30 it will be difficult to develop well later, especially during this time we know that tolisso is a player who often suffers serious injuries so I think if OL can't expect too much from him, his failure at bayern munchen is not because he is a bad player but his frequent injuries make him fail to develop and OL should pay attention to that before returning bring it home even though for free.
He has a market value of 15,000,000€ and if Lyon manage to get at place in the Europa League next year, he will attract international interest and they can sell him at 28-29 years. His contract runs until 2027, so another 5 years. He will also meet an ex-Munich player Jerome Boateng, he was there until 2021. So Tolisso has a lot of old friends in Lyon. He will feel good there.