Felix needs more time to prove his worthyness for Milan. he goes there as a loan, and has to adapt more to the club. I believe Milan won't rush to send a signal to make him as a permanent transfer, though he performed perfectly since his first game with Milan.
As long as he can still consistently scoring and assisting, in the end, he will be Milan's permanent transfer. I believe they can pay a lot of money to get him. Hopefully, he gets a success there.
Felix should be able to adapt quickly to the Serie A competition, because he has played in La Liga and the Premier League. It does not mean that Serie A is not competitive, but his provisions and experience playing in more prestigious competitions, Joao Felix has enough experience to prove it playing with AC Milan. Even so, Felix will definitely adapt to his teammates, creating a strong bond to establish solid chemistry. At the same time, AC Milan management will not rush to make Joao Felix permanent, especially since he has not proven how far he is able to contribute. The most important thing right now is that Joao Felix has the determination to be recognized by AC Milan by showing good performance, plus he stated his intention to be with Milan even though his loan contract is over. In order for everything to go smoothly as he expected, Joao Felix must prove his capacity as a classy player. Thus, it is likely that Milan will make him permanent. Unless, during his loan period Joao Felix did not contribute to Milan and that means the opportunity to become a permanent player does not seem to be the right opportunity for Milan. Well, Milan will visit Feyenoord's headquarters, it is likely that Joao Felix will be played either as a main starter or a reserve player. What is certain is that in this match, he has the opportunity to perform to his full potential.