They don't seem to be signing many players for this season because it's clear that the arrivals of Vitinha and Nuno Mendes and Danilo Pereira have also taken a lot of their money, not to mention the extension of Mbappe's contract which is indeed an astonishing one in my opinion.
As for the problem of the Champions League, their target is always there, but I have seen some news that the PSG officials will not be too ambitious with the Champions League in Galtier's first season.
On top of that, they didn't lose too many players, so they do not feel like they need more players. They already had a good team last season, and they had Nuno Mendes before as well. All they want right now is to repeat last year. Sure it wasn't a great year that ended with UCL for them, but it was a good enough year. This is why I believe they will be doing fine enough.
The team was good, they just lost to Real Madrid who went on to win the whole thing, which isn't a shock to anyone. If they could play with the same roster but play better, they should be able to get something out of this year. Many teams want the same thing, title at the league and the UCL cup, it will be tough.
Getting the title in Ligue 1 has become a fairly common thing actually and it's already in the grip if roughly speaking now that they don't have any rivals at the moment.
But if that's the case, they certainly won't be satisfied, because what's the difference between them and last season if their achievements just end there. Even though there is no obligation to win the Champions League for Galtier but of course they still intend to do that.