According to FootballTransfers, Manchester United are interested in signing Joao Cancelo during the upcoming summer transfer window.

Manchester United are interested in signing Cancelo
Cancelo made a move from Manchester City to Al Nassr last summer, but now there is a possibility he could return to the Premier League this summer, with Manchester United considering him as a potential target.
During the winter transfer window, Manchester United secured the signing of Dorgu, and now they are looking to bring in a new right-back in the summer, with Cancelo being one of their options.

Manchester United’s new signing, Dorgu
Furthermore, the final decision on whether to sign Cancelo will be made by Manchester United’s manager, Ruben Amorim.
However, the club’s hierarchy believes the player may be open to accepting an offer from Old Trafford.

Will Cancelo eventually return to playing in Europe?
Although Cancelo still has two and a half years left on his contract with Al Nassr, he could leave the club this summer, and Manchester United may intensify their pursuit in the coming months.