PSG will be effected the most with this world cup with how many players are still active for their national teams. For PSG is good that champions league is still 2-3 months away and ligue 1 dosent put much presure on them because they can even play that league with a second squad
PSG is now just 5 points clear of Lens A in Ligue 1. So PSG will have to perform well in every match after the World Cup and widen the gap with Lens. Otherwise, it will be difficult for PSG to win the Ligue 1 title. PSG will probably not get all their main squad players after the World Cup. Several players are likely to face injuries. PSG coach Galtier must keep his match strategy tight.
I don't see them (Paris Saint Germain) having any trouble winning the Ligue 1 title. The 5 point gap they now have is quite a distance, you can say it's quite far if this is in Ligue 1. Although they will suffer a loss because many of their retainers play in defense their country, but they have a squad that can even be said to not have a big gap with the main players. Which will be different if we talk about them in the Champions League.
PSG will be back to their full form shortly after the World Cup ends. However, some of PSG's best players are in the top 8, including Messi-Neymar Mbappe Ashraf Hakimi. Hopefully all of them will be healthy until the end of the World Cup and will fit into the PSG team in a big way.