I think he had a very similar form at the WC. If you see how he raced on a much harder profile. Doubt Pogacar would’ve been able to do anything during Flanders or RoubaixIt seems MvdP never regained his Flanders/PR form after taking a long break mid-season. The moral of the story is don't take too much time off the bike during mid-season break.
Regarding his Flanders/PR wins, he's lucky Pog wasn't on the starting line for either race.