It's not a JRPG.
It has nothing in common with JRPGs.
Being turn-based does not make it a JRPG. JRPGs do not need to be turn-based. There are countless games that everybody accepts as JRPGs which are not turn-based (eg. Kingdom Hearts).
It is not made by Japanese people, nor is it influenced in any way by Japanese culture, nor is it aesthetically Japanese.
It does not share a fanbase with JRPGs. 90% of people playing this game are those who loved games like Elden Ring, Baldur's Gate 3, and Skyrim, NOT those who loved games like Persona 5, Metaphor ReFantazio, or Dragon Quest.
Clair Obscur is literally just a turn-based Soulslike with a generic European fantasy aesthetic. That places it firmly within the WRPG category.