I think it is very inappropriate for Manchester United to sell Bruno Fernandes because after all, it seems like Bruno Fernandes is still the main choice for Manchester United's main squad. Moreover, Erik ten Hag will also still be the manager of Manchester United nextseason and as such, it will certainly be difficult for Erik ten Hag to make big changes quickly for next season. Unless, if Manchester United sacks Erik ten Hag and then appoints a new manager, then it is likely that a major reshuffle could also occur. After all, Bruno Fernandes also has a contract until 2026 and at the age of 29, then I think it is still very feasible for Manchester United to keep Bruno Fernandes.
Fernandes has actually played quite well so far, it's just that Ten Hag doesn't have the best way to tame the squad he handles. There are rumors that several former Man Utd players say that the only person worthy of managing Man Utd now is Zidane, they are very confident that Zidane will be able to return Man Utd's glory as when it was still managed by Alex Ferguson. The composition of Man Utd's players is actually very good and just like you, I also think that Fernandes is currently 29 and he is still fit to play for Man Utd for some time to come.
The older and more experienced ones generally perform better, but if Zidane takes full charge, Manchester United will be roaring back on their own. It will only be best if you can form the right cells and players and be ready to attack in any way. Still Manchester United is a self-sufficient team, because Fernandez is still among the best players, he will perform better but is losing out with the age gap.