I know that they would have to sell 10m copies on PlayStation 5 and life time, I believe that it will. There's no other pirate type games out there and the one that was supposed to be the better game (Skull & Bones) is total shit plus it's a co-op/multi-player game which is said to be a shit ton of fun and blast to play so I definitely see a lot of casual players which is basically the majority of PlayStation 5 owners eating up this game. It has six years worth of content to play through. As long as their servers are strong, I honestly don't see how this ends up not selling 10m copies. And it's only $40 for the standard edition.
As for Xbox, my bet is that it sold a good amount because like with most live service games, better off owning it than paying for the subscription unless of course, you're already subscribed to Game Pass and plan on staying subscribed. I do however believe that it sold much better on PC, mainly Steam because Steam is simply the store front you go to if you're a PC gamer and a lot of people hate the Windows Store.