After years of injuries and trying to have solid combination now things are working perfectly for Liverpool, and they are having good dominance in Premier League and Champions League this is surely going to be historic season for Arne Slot who is current in charge and taking good advantage of Jürgen Klopp hard work.
Now they are unofficially champions of English Premier League as they have 13 points lead and 10 matches remaining while they are already in EFL Cup final now they needed to concentrate on Champions League which is never been easy PSG is having good results in last few weeks which give them good confidence their win against Manchester City and Stuttgart big breakthrough even currently they are not good enough to have win but still now they are doing impressive work for having good end of their season.
Liverpool is doing very well in the league, just like you said and they are also finalists in the EFL cup, down to Champions League, they didn't lost or draw any game until the very last day of the Champions League group stages phase which they dropped points. PSG on the other hand is doing marvellously well in their league as always though and came alive stronger in their last 2 games of the UCL. Right now, between these two teams i really don't know which one will be victorious but I'm sure we are going to have a great and epic game on Wednesday between both of them.
PSG have always been characterised by their inability to perform well and consistently in the Champions League. Every time they have something wrong with them. Given that they will now be playing against the actual EPL champions - they have no chance of winning. The best they can get is a draw, but it's no use, because it will lead to a defeat anyway.