Constructive dismissal isn’t really a thing for footballers. It’s well known in the implied contract that a footballer can be in and out of the team and train with reserves if not wanted. Mbappe has just had that threat from PSG.

It could be the case if someone raises bullying or discrimination and it’s not addressed for example. But not because the club don’t want them. That’s why you don’t see it in football as it’s just part and parcel of the game.