This is merely a rumor. It can't be real. The same thing happened in May when it was reported that Maguire was a target for interest from Tottenham and West Ham. This supposed information that Chelsea wants to sign Maguire will never be true, it would eventually fade away.
Such news is impossible. To develop a strong squad, Chelsea's owners and fans would not even consider signing Maguire at this moment. The last player they could think of signing would be Maguire. Instead of Maguire being upset about being fired from the team and having his captaincy removed, Maguire should leave Manchester United as a free agent, just like De Gea did.
Rumors don't always have to be believed but sometimes rumor can be true we don't know what their plan is. If you think Manchester United will let Maguire go as a free agent it was a mistake we have to remember when Manchester United signed Maguire they paid 87 million for it so Manchester should get something for his departure. The market value for Maguire is 20 million imagine they could use it to pay player salaries in a few months.
I doubt that Manchester United will release Harry Maguire as a free agent, which means letting him stay at the club until his contract expires, because when the season is over, there has been a lot of growing news that wants Harry Maguire to leave United as soon as possible, but unfortunately this player refuses to leave the club, and those who don't less confusing is the price set by Man United which seems to be an obstacle for any club to own him even though it is quite understandable because United bought this player at a high price but if United let him be owned by another club they should only sell at market price because of the opportunity to get offers from other clubs is still small because seeing his performance that doesn't show anything special while at Manchester United, staying at his current club will only make him be on the bench more often than on the field to play, or he will only play from the first minute if there are injured core players.
Actually, Manchester United are serious about releasing Harry Maguire in the current transfer market. It's just that no one really wants Harry Maguire yet. West Ham actually made an offer to Manchester United. But it wasn't an offer to buy Harry Maguire. But West Ham only made an offer to borrow the former Manchester United captain. And of course Manchester United immediately rejected the loan offer from West Ham. Because Manchester United don't want to lend Harry Maguire. But Manchester United want to release him in full. And the latest rumor is that Chelsea are also interested. But I also doubt that these rumors will come true.