This is actually self evident if one just goes about the conversation on a publisher-by-publisher basis. Let's start by looking at Capcom, who are actually among the more prolific supporters of Xbox platforms (and who get credit for being among the first big Japanese publishers to pivot to the Xbox 360 at the dawn of the HD Era). Not only did Capcom release almost all of its games this last generation on Xbox platforms – so Resident Evil 7, Resident Evil 2, Resident Evil 3, Devil May Cry 5 (which even had Xbox marketing), Mega Man 11, Ace Attorney Trilogy, Marvel vs Capcom Infinite, and Monster Hunter World – they even had some pretty major Xbox exclusives to begin with. Dead Rising 4 was a timed Xbox console exclusive, while Dead Rising 3 still remains exclusive to Xbox consoles and PCs to this day.
And yet, something has clearly changed. Don't get me wrong, Xbox is still clearly getting all the big multiplatform Capcom titles – we know, for example, that Resident Evil Village is coming to Xbox One and Xbox Series S and X. However, consider that Capcom is now focused squarely on the Switch rather than Xbox, with Nintendo managing to get multiple Capcom exclusives between Monster Hunter Rise, Monster Hunter Stories 2, the upcoming Resident Evil Outage (which is at least a timed Switch exclusive, based on the recent high-profile Capcom leaks), as well as smaller titles such as Ghosts and Goblins Resurrection. Based on those same leaks, titles such as The Great Ace Attorney HD are also going to be skipping Xbox, and going to PlayStation, Nintendo, and PC only (with the same leaks suggesting dismal sales of The Ace Attorney Trilogy on Xbox One as being responsible for the decision). So even with multiplatform games, at least smaller ones, it looks like Xbox isn't guaranteed full Capcom support (though here to be fair, it seems like that can be said of all three consoles – PlayStation, Xbox, Nintendo all seem to miss out on some Capcom game or the other, it feels like).
Then there is Square Enix. Not so long ago, Square Enix used to be known for going all in on one console, and releasing all their games for that one console only (PlayStation most recently, Nintendo long ago). Since then, their strategy has been… scattershot? They still dabble in exclusives, but there doesn't seem to be a pattern. Typically, Kingdom Hearts seems to stay PlayStation exclusive, Dragon Quest Nintendo exclusive, and other games more spread around, though even there, we have started seeing multiplatform releases across those franchises in the last few years (as mentioned, the last Dragon Quest and Kingdom Hearts releases were both multiplatform).
But this last generation Square started achieving some consistency with Xbox. Final Fantasy 15 came to Xbox One day and date, and the entire Final Fantasy back catalog from 7 to 12 got ported to Xbox too. Kingdom Hearts 3 came to Xbox day and date, and The Story So Far got ported to Xbox too. Nier Automata and the upcoming remake of Replicant are both on Xbox. Dragon Quest marked its Xbox debut with Dragon Quest 11 S. So far, so good, right?
But now things seem to be trending in the opposite direction almost right away. Final Fantasy seems to have returned to being at least a PlayStation console exclusive (at launch, if nothing else). Final Fantasy 16 is announced only for PS5 (though a PC version leaked). Final Fantasy 7 Remake launched only on PS4. Even with Final Fantasy 14, which finally confirmed an Xbox version last year, Square seems to have walked back on the commitment, and it is possible that the popular MMO will never come to Xbox, and remain PlayStation exclusive.
Even outside of Final Fantasy, we find Square being much more willing to make exclusives for PlayStation or Nintendo, but not Xbox. PS5 was debuted with a brand new Square Enix IP headed for it, Project Athia, while Babylon's Fall is also PlayStation exclusive. Meanwhile, Switch was debuted with a brand new Square Enix IP headed for it, Project Octopath Traveler, that went on to become the hit Switch-exclusive JRPG Octopath Traveler in 2018. Bravely Default 2 is a Switch exclusive. Switch got another new IP from Square Enix announced at the recent Nintendo Direct with (and I really hope they change the name) Project Triangle Strategy.
The article continues by mentioning that even indie/smaller Japanese devs are abandoning Xbox but SEGA and Bandai Namco have had the opposite approach and have continued to stick & support the Xbox. Thought this was pretty interesting overall