PSG won't win against Bayern.
They are not even close...
1) Their road to the this final, after group stage, was: dortmund, atalanta, leipzig. (It's maybe the easiest ever since RM's ridiculous road in 2016)
Who is the hardest they faced? Atalanta. Who they were trailing until 89th minute.
Have they faced any big club? (the ones they usually bottle against? Like Barca, Real, United etc) No!
2) From a pure squad quality and tactical pov they need a miracle.
Yes, they can hit with pace Bayern's defense. But, Bayern will not play a high line like against Barca AND
They cannot cope at all with Bayern attacking and pressing with intensity