If he wins the Champions League, it could be an exception because maybe he will be included as one of the candidates for the Ballon d'Or. Dembele has developed quite a lot this season and he has fully contributed to the team, this is different from the previous few seasons where Dembele lost his best touch when given the opportunity by the coach. There are many players who have achieved the best careers with their clubs so the potential to be included as one of the Ballon d'Or winners is quite open.
Apart from that, I am quite sure that Dembele will continue to give his best contribution this season to PSG because he also wants to show the world that PSG also has great potential to compete in the Champions League until the end. Apart from that, it is about his candidate as a Ballon d'Or winner if he is able to give such stunning action in every match in any competition because he will also be quite happy if his contribution can provide an individual trophy like the Ballon d'Or.