Either way he is in the lead of being able to claim being the best generational GT-rider of his generation, right now. So right now, he is fulfilling your criteria that he would be able to do for having GOAT status.
This other stuff dont really matter. Because you actually have take into context of the last two Tours and why Vingegaard won then. This is when the conversation just gets very subjective though.
So you have to go by results, win and podiums, no matter what to eventually decide this matter. Pog is leading that, right now, so is the best generational GT rider. Will he end up being that? That is still up for debate and only time will tell, but not if he currently is or not. He holds that position, right now.
Because current affairs, which is here and now, he is the best generational GT rider by leading that rank over Vinge with more wins and podiums. It doesnt matter what happened in the last two, you have to take into the last 5 years. Pog is clearly leading this generation. Lets what happens in the next 5, to see if it still holds up.