Capcom’s games don’t sell well on Xbox anywhere.
Xbox customers are more skewed towards western tastes than other platforms.
Yet they're still huffing and puffing as if getting a port of FF XVI and Rebirth will "save" those games, when they both
1) sold pretty well already as PS5 exclusives and,
2) are now on PC (Steam).
What in the post even implies that’s what they meant?
Well, a lot of certain gamers (usually Xbox diehards) have in the past implied Japanese people only buy Japanese consoles and it's a conspiracy why Xbox is so small in the country....
....even though Japan literally loves stuff like the iPhone, and American fast food (albeit with more Japanese-style flavored takes that are also a lot healthier on average than the American variants).
There’s almost no way the game sold 20%-100% more on PS5 than on PC. I’d be really surprised if it sold better on PS5 given the insane CCU on Steam. It easily surpassed Elden Ring which also sold the most there.
IIRC the split between PS and PC for Elden Ring wasn't anything huge; the difference was within a 3-5% range all said and done. Now, the new Monster Hunter doesn't have a PS4 version....but it also has way higher system requirements on PC than Elden Ring, which would eat into its market cap there, too.
Also, the IP has a long history with PlayStation hardware; even with Steam growth the past few years I doubt that suddenly overturns the decades of cache the IP has with PlayStation gamers across the world. So I won't be surprised if, at the very least, like with all other modern Capcom games the bulk of revenue comes from PlayStation same as it does with titles like SF6 and the RE games.
Units sold, it could be a bit different. Steam could take up more of the unit sales, but I wouldn't expect it to be by any major amount. 5% - 10% is the likely range. Also, PS5 has the benefit of a physical release, which could help it out.
So basically...
Units Sold: Potentially PC/Steam > PS5 >>>> Xbox
B2P & MTX Revenue: Likely PS5 >> PC/Steam >>> Xbox
And I think that will especially hold true over the lifetime of the game.