Before we assess Evenepoels possibilities as a GT rider, we have to know how he performs in the high mountains. It's his 4th pro year, and so far he has raced only very few high mountain stages, and hasn't performed good in any of them (circumstances weren't always in his favor, but still....). We assume he'll be good, but we don't KNOW.Where he can beat Pogacar - He can put time into him potentially on flattish ITTs especially courses that reward strong aerodynamics and also TTTs where Quick Step have always been seriously strong if they come back into vogue in GTs.
He might also put time in on long raids in hilly undulating days where he could majorly weaken and stress Team UAE albeit Pogi has shown he is more than handy in this aspect himself as well if he takes off the leash and chooses to respond personally.
All that taken into account he will still need to find a lot more than has been able to be shown so far to be able to win with both in great form as Red Flanders rightly points out bonus seconds could be a big factor giving Pogacar maybe another 30+ seconds in the bag.