PSG are already on the edge of the Champions League elimination zone and will face RB Leipzig this weekend, so there is no need to expect much that PSG are still not worthy of advancing further. The Champions League seems too difficult for them.
Above PSG is Real Madrid who also have very little chance because they will face Atalanta. It makes sense why Madrid are considered to have little chance, in terms of performance they still can't promise anything and are now bottom of the standings in 24th position, so the match against Atalanta determines whether Madrid advances to the play-off round or out.

Nope. There is not one game ahead but three and in order to get into the playoffs Real needs to get 5-6 points, maybe even less, but 5-6 is more reliable. Vinny and Rodri will play in the game with Talanta, so Real will be stronger than in the last games. As for PSG, they have a game with City, who also need points, so their position is really difficult. If PSG is eliminated at the end of the group stage, it will be one of the funniest things this season.