Hopefully that InXile Steampunk RPG is true there is literally zero AAA big budget Steampunk RPG so that would be something new. That would give Xbox every type of RPG imaginable.
We got Avowed, Fable & ES6 as Medieval fantasy RPG
Fallout 5 or New Vegas 2 for apocalyptic world RPG
Starfield & Outer Worlds 2 for Space RPG
Compulsion Games probably making a “We Happy Few” like style RPG
That just off the top of my head there is probably more being work on that we just don’t know about yet. All that is really missing is some JRPG like Blue Dragon and Lost Odyssey style and Xbox would cover every type of RPG genre.