It seems that Joao Felix's return to Atletico Madrid did not make him Happy. It seems that he still can't get in touch with Diego Simeone. With these bad rumors, Joao Felix has been linked with many clubs wanting him. I think Joao Felix is a good player, at Chelsea he was not at his maximum because of the coach. There is news Barcelona and Man United are interested in Atletico's most expensive player. Of course they can take advantage of this bad moment to get Joao Felix.
We even forget, that now Joao Felix has returned to his home club Atletico Madrid. since he returned from Chelsea, not many rumors linking him. To be honest, I am not aware of the rumors associated with this Portuguese player. but based on some of the newspapers I read, the future of Joao Felix is currently the subject of speculation. a number of clubs, including Manchester United, have been linked with his services.
Reportedly, Felix returned to Atletico for pre-season training last week after completing his loan spell at Chelsea. however, he was reportedly training separately from the main squad. then, rumors of a departure this summer also surfaced. even based on rumors, Felix is known to not get along with the coach. it also made Felix, join Chelsea on loan in January. referring to what you said, I'm not quite sure if Barcelona and Manchester united would be interested in him. The problem is, these two clubs are both hit by problems. so, it is such a difficult thing to make happen. except, if Atletico again make him a loan player at a low cost. Thus, what you say may be realized. even then, if rumors or speculation that Barca and United are interested in his services.