That is something natural, with the development that Felix did it might change the view of Atletico Madrid and Diego Simeone to undo his intention to sell Felix. I think it is the result of the hard work done by Felix so that it makes him glimpsed by management and coaches.
This is a lot to talk about especially after Felix was loaned out to Chelsea which made many of us speculate that Felix was not included in Simeone's game scheme, or even Simeone did not like Felix.
At Chelsea he played well, although he didn't make a big difference to Chelsea but it wasn't his fault but the team's situation was bad. But in terms of performance he was good.
Joao Felix in my opinion is a good player in the right hands. But the thing is at Chelsea he really can't develop any more than he should. When in the national team he was quite dominating in building attacks on the opponent's defense. However, the 2 clubs, both Chelsea and Atletico Madrid, were unable to manage the team because the problem was with the coach. Simeone has lost Atletico Madrid's style of play and he should be replaced with a coach who can add a bit of a new touch. Therefore Joao Felix was not happy to return to the club, even though he had said he was comfortable at Chelsea but Mauricio Pochettino still returned him on the grounds that it was not in accordance with Pochettino playing ideology.
IMO actually seeing from the current condition he really deserves to be in a big club. but indeed when it does not fit into the scheme of what Pochettino will do next season he also cannot talk more about this, but it does not mean he is a bad player it's just that there must be a coach and club that is really right to make his potential even better.
At Atletico a few seasons earlier he was a mainstay and for Chelsea also actually contributed quite well even though Chelsea did not get anything but indeed for now he has not entered Pochettino's plans in Chelsea's future and it is likely that his fate will be the same as before at Atletico.