It seems that Man United has to suffer from the same problems as last season when many players faced injury issues, and now Maguire, who is a key player for ETH, has to deal with an injury.
So, will this be good news or bad news? IMO, it's time for Manchester United's management to address every issue, such as Maguire, who should actually be replaced due to his slightly older age. It would be better to recruit younger, more aggressive players who can make a significant contribution.

Are you sure Maguire is a key player in Man United?

I assume Man United key players for center backs are Matthijs de Ligt and Lisandro Martínez.
It is strange if Man United relies on Maguire and makes him as a key player. Having him on the lineup just increases the chance of a lose.
I personally think it is good news. If Maguire can't play, Man United removes 1 internal problem. Maguire has the most error player record in history, he actually doesn't deserve to stay in Man United anymore. But Ten Hag always keeps him every season because Ten Hag seems having no motivation to improve Man United performance.

I hope Maguire will focus on his injury for few months.