I'd say JRPG support has been the best ever for Microsoft consoles thus far.
Final Fantasy 15 Pocket Edition HD
World of Final Fantasy Maxima
Final Fantasy Type-0 HD
Xbox One X patches for FFXIII, FFXIII-2 and Lightning Returns FFXIII
FFVII, IX, X HD, X-2 HD, XII
Kingdom Hearts 3
Tales of Vesperia Definitive
Valkyria Chronicles 4
Monster Hunter World
Pier Solar and the Great Architects
Shining Resonance Refrain
a few ones that aren't typical JRPGs like Dark Souls 2 and 3, Nier Automata and Dragon's Dogma Dark Arisen.
and a couple of smaller ones.
Far more and better titles than what the original Xbox and Xbox 360 got.
Eh, the 360 got exclusive JRPGs in addition to some multiplatform games (as a lot of that list is just ports of games already on 360). Not a single one of those games require an Xbox to play them, so I find it hard to agree with you.
Keep playing exclusives, I'd rather play games and that's where X1 has clearly more and better JRPGs.
Also out of the 21 Xbox One games I've listed there are only 3 ports of 360 games on the list (Dark Souls 2, Dragon's Dogma Dark Arisen and Tales of Vesperia Definitive Edition), so what are you talking about?