Man united are aware their midfield is in trouble so Ten Hag is eager to bring in De Jong. But I heard that Barcelona is not yet willing to take it off at a price of 60 million euros. Then Man United added up to 70 million euros. But to date there has been no official decision from Barcelona.
It seems that Barcelona took advantage of this moment to earn money. They tried to shut down the financial crisis that hit them which caused some players to leave and some players to get pay cuts. We see the transfer season is still a little long.

Source:  https://www.mirror.co.uk/sport/football/transfer-news/man-utd-transfer-de-jong-27221790