Palmarès matters when having GOAT conversations obviously. There is also the matter of comparing Merckx's full career to Pogi at 26.
In my view, Merckx's palmarés is totally impossible to reach in the modern era. It is also true that Pogi is the most impressive rider I've seen in all my years watching (97 onwards). If he keeps at it, I can see him reaching something akin to Hinault's (in my view, the current #2 OAT).
Currently I'd put in about on par with Indurain or Coppi on palmarès alone. There is zero doubt in my mind that he will surpass them. He also has a real shot of being the second ever to win full sets of both GTs and monuments which is a crazy achievement in itself and a testament to his versatility in an era of specialists. This, I feel, would put him at a clear #2 OAT.