Injuries might not be a serious problem for PSG as it might be for Bayern Munich. PSG have really good squad depth when it comes to attacking options as they have Mbappe, Lionel Messi, Neymar, Draxler, and Angel di Maria in their squad. This means that the coach can rotate the squad even if one or two players are missing.
PSG have many better players than Bayern Munich but in many seasons we saw PSG got troubles when one or two key players missed one match in knock-out phase of Champions League. Moreover they failed too even with their best players and I believe that if PSG have some injured players by World Cup 2022, they will lose a lot of strength when Champions League returns. With burden of failed past seasons, they might be beaten by Bayern Munich.
In terms of Bayern Munich, I think they might have a problem as Sadio Mané might be returning to the pitch after a long time and I think they might seriously miss Robert Lewandowski. Overall, I am looking forward to a contest that will be really exciting as both teams are very capable of winning it.
I know Bayern Munich have their problems but they are stronger than PSG in Champions League and maybe history will have its voice in these matches.