Maguire is a player for England's main national team and it's been a while since every English player has always been the priority at Manchester United. But the arrival of Erik Ten Hag was considered brave so not a few of Maguire's matches were postponed. In contrast to other coaches, before Erik Ten Hag at Manchester United, Maguire performed poorly and was always used as the main player. So I saw a firmness in Erik Ten Hag, he really controlled Manchester United for the sake of mutuality. Moreover, even if Maguire leaves, I don't think it will have too much impact on the stability of Manchester United's game.
The weird thing is, Maguire is the type of player that should be at max Championship level teams defender, he is not good enough for United, not good enough for premier league if you ask me but maybe lower end, and certainly not good enough for England national team. I have absolutely no idea what people see in him, there was even a moment when he was subbed in and the other teams fans cheered, that should tell you all you need to know about him.
I get that maybe he used to be better, but he longer is and his mistakes cost United a lot of points last year, in fact he was one of the main reasons for it as well. They are much better without him this year, and should sell him asap.