Honestly it would be really great for Manchester United if they get rid of him as soon as possible. On loan or permanent deal they wouldn't have to pay his salary or most of it at least. Because he is really no use for Manchester United. He will stay as a rotation player and he won't be a credible player when ten Hag has no choice other than putting him in the lineup.
You're right. Manchester United must release Maguire as soon as possible to another club.
Maguire does not fit in the Manchester United squad because the position occupied by Maguire should be filled by a player who is typically ready to bleed in defense as Vidic and Ferdinand have shown in their era.
For us, ten Hag also needs to let go of several players in midfield positions like Fred and discourages Weghorst permanent status and focuses on getting West Ham United midfielder, Rice and Tottenham striker, Kane given that next season's competition is quite tight.