I'm sure this is fixed match.
We know the strength between them, knowing how PSG beat strong opponents like Bayern Munich and Real Madrid, while Chelsea doesn't, PSG should have no trouble to beat Chelsea. We see the domination from PSG in ball possession, but they intentionally make error when they're near Chelsea's box.
I mean, this is just Club World Cup, not a prestige competition, hence they don't really care to become a champion.
FIFA was the entity behind this fixed match.
This is funny and at the same time not funny. As much as I dislike and hate that club Chelsea, I can't come out to say or pen down thier hardwork into this. Yes they had an easy run to the finals, but the finals wasn't fixed. The Champions of Europe had all the ball possession but they weren't direct. If you watched the game, Chelsea kinda pressed at the right moment and sat back at the right moment. Congratulations to them, it worked. Give them thier flowers.