I think Mourinho is going to be very likely to leave the team now. He seems ready for an offer from PSG already as it has been on the news for a long time.
I don't read any news with information that Mourinho told Roma that he is in deal with PSG and want to leave the club. Around the UEFA Europa League final match, Mourinho said that he has nothing to hide and he was not in contact with any club. If he has such conversation, he will let Roma know like what he did in January this year, after World Cup 2022.Quote
PSG must have been thinking of replacing Galtier after this poor season already and Mourinho is surely among the best candidates for the job. Mourinho's style is a little more different from the managers they have had so far though. But I think Mourinho would also feel the need of adapting to the environment a little.
Galtier did bad job but hiring Mourinho means no beauty football. If PSG want to win titles, hiring Mourinho is good choice. If they are still obsessed with beauty football, hiring Mourinho is a bad choice and will cause conflict between the club and the coach when no beauty football and result is not good.Quote
In the end we shouldn't see Mourinho parking the bus easily with a squad like this one in hand. 
No matter Roma won the Europa League title or not I was going to expect him to leave. Because taking the helm at PSG must be much more attracting to him instead of staying with Roma. He can do the things in his mind easier there.
If he comes to PSG, he will manage them like Real Madrid. With Mourinho, Real Madrid did not play beauty football but they scored a lot of goals, got many points in La Liga. However, even his players scored many goals, people did not satisfy and attacked Mourinho too. He will get a same attack if he becomes a coach of PSG. No matter Roma won the Europa League title or not I was going to expect him to leave. Because taking the helm at PSG must be much more attracting to him instead of staying with Roma. He can do the things in his mind easier there.