I would say 2 million minimum on PS5, its #2 in sales only behind Fortnight on PS5.
Nah, it's less than that. I just remembered (well, was reminded by others) that Wukong's also on EGS and WeGame. I know EGS is usually bad for B2P sales, but I wouldn't really discount WeGame. They're owned by TenCent and are a competitor to Steam in China.
So even if they're just the Chinese EGS by default, given the size of the Chinese market plus most of the game's sales being in China (very likely at least 6 million have been in China alone via Steam), they'd take up a decent chunk of the remainder.
I think at least 8 million on Steam is a fair guess, leaving the other 2.7 million between PS5, EGS, and WeGame. EGS probably has the smallest share of that by far, so really it's between PS5 and WeGame. Let's assume it's 250K on EGS; WeGame is probably roughly 3x-4x that. So in total could be 1.25 million between EGS & WeGame.
That'd leave ~ 1.45 - 1.7 million for PS5. Which would likely make sense; most of this game's hype and WOM has been driven by PC & Steam, and in China (where the vast majority of the sales are), PC is the dominant gaming platform. Also there have been no traditional media (television, film trailer, billboard etc.) advertisements for the game on TV and such, which is a big way how games like Spiderman 2 or GOW Ragnarok have been able to make the big 5+ million sales they do in a week or whatnot on PlayStation consoles.