I have a thought that maybe Mbappe will be released soon and join Real Madrid after that PSG will look for a replacement for Mbappe, namely Kane.
But these are just my thoughts because there are too many rumors every day that cloud my mind in the hope that Kane can really replace the same Mbappe with good performance and contribution to strengthening club solidarity.
There are a lot of rumours, but it is certainly not just a hope for someone, but also about an agreement between the two clubs, because from what I read on Tweet
@FabrizioRomano, the offer from Bayern Munich has not been approved by Tottenham for one player. this (Kane). But that also doesn't rule out PSG if they can offer a higher offer than Bayern Munich, but for now I also don't think PSG are interested in Kane.
If Mbappe is still going to play at PSG then I'm sure PSG will not try to sign Kane. Unless yes, if Mbappe leaves in the transfer window this summer then of course, PSG will continue to have efforts to be able to bring in Kane and or maybe other players. Thus, PSG still won't be able to get any better in the Champions League because after all, if several PSG key players leave then that will also be enough to make it difficult for PSG to maintain its dominance in Ligue 1.
If Mbappe leaves PSG, maybe PSG will try to bring another player to the team. In that case, English star Harry Kane's name may be on PSG's list of favourites. PSG have expressed interest in Harry Kane, but it remains to be seen if Harry Kane will eventually join PSG. Because the English star can go to a club that will fulfill his dreams of winning the league title and the Champions League title, in this case PSG can never be his best club. And I agree with you that it will be difficult for PSG to win the league title next season because PSG has already lost several players. There are good quality teams in Ligue 1 who faced PSG when they were at full strength, but now that they are star-less, PSG may lose their league title next season.
It seems that Mbappe is ready to move to Real Madrid next year as a free agent and if this is true, it is unclear how PSG will behave. Will Mbappe make the squad? On the one hand, to put him in the squad knowing that the player is leaving is not very good, because it is not very clear how he will play? Will he give his all and even if he does, the club still knows that he will leave at the end of the season.
PSG can put young and promising players in Mbappe's place, but then a player who gets a lot of money will just sit on the bench.
In general, Mbappe has created a lot of problems for the club with his decision.
Kane seemed to want to go to Bayern, but so far Tottenham have not given permission for the transition.