Manchester United are already in talks with Erik Ten Hag's representatives over a new contract.
A new deal is expected to be reached soon, with INEOS wanting to give him total trust for the future.
Source: @FabrizioRomano
I think Manchester United does not have any worry about what is going to happen with Ten Hag in the future. He has already brought in a very bad result for Manchester United.
By the way, I cannot trust a coach who has problems with the players in the squad. And it is not one or two players. He has problems with multiple players. Players also have decided to leave Manchester United just because of him. So I do not understand how the Manchester United authority is not concerned about this. Are they keeping him as the coach just because he was able to bring in the FA Cup?

or did they take this decision because they do not have any other better coaches right now?

One thing you need know is that, Setbacks are part of the job and you need them. Pep Guardiola faced it, Jurgen Klopp faced it and Mikel Arteta is still facing setbacks despite have double best seasons, you see? But with all of the setbacks, Erik Ten Hag is showing result by winning double trophies in two seasons.
The player was wrong for bringing things outside. Sir Alex Ferguson had issues with David Beckham, With Roy Keane and who else? Erik Ten Hag is not the first and will not be the last one of them.
All he wanted from Jadon Sancho was a little apology and the lad had ego issues when he hasn't even done shit for Manchester United. Glad he will be sold so these disrespect do not continue.
Players like who? They should leave. I don't even understand why players who are being overpaid can't run to and fro a pitch. I envy players like Luis Diaz and what he brings to Liverpool. The last part of it is that Sancho will be sold end of discussion.