I think they are already champions, that's the worst thing about the French league, there is only 1 team and every year it's the same, every once in a while a surprise team comes out and becomes champion.
The Paris Saint-Germain in this season are the best so far and they are currently leading with 10 points ahead of the next club who is the second position in the League 1 table standing and that has shown the level of prowess that PSG has shown at the league stage.
That can also be replicated in their Champions League which they have as their next fixture. I feel like Mbappe wants to do it again for the club before he finally leaves since talks have garnered around the space discussing his possibility of leaving the PSG any moment from now. It's a good outing for PSG this year and they have continuously shown their capacity to be one of the elite clubs in the German League.
No, Ligue 1 and Champions League are two different world, much more different than many of the other leagues are in comparison to the Champions League. In most other leagues, especially in the Premier League, the teams have some serious competition throughout the season and that keeps them focused. Name one team that you consider serious competition for PSG in Ligue 1. I don't know a single team that I believe could compete with PSG over a longer period of time. They can only wait for the Champions League games and then receive their reality check. We know how this often ends for them.