I don't believe so. Ballon d'Or is an individual award and Champions League trophy is a team award. Any team winning Champions league already has a huge trophy on their name. As well the best team doesn't necessarily have the best player. Though many times it's the player for the winning team that has got the Ballon d'Or but it should not be made a precedent and it should be open for all.
This year, PSG are the winner and Ousmane Dembele is the prime option for Ballon d'Or, not just because he's from a winning team but 35 goals and 15 assists is something we don't see everyday. Yamal is close, even if not as many goals but much more assists. Raphinha scored mostly on Yamal's assist. So, it would still be a tough competition.