NieR Automata Soundtrack is marvellous but I think most people don't consider the game a JRPG.
I'd imagine they do.
Not sure how you would quantify 'most', but I googled "Top Jrpg 2017" and the first/top hits that came up were as follows:
The Year In JRPGs, 2017
Nier Automata - One of the year’s most fascinating games, Nier Automatais a great string of ideas that I’d like more if it were, say, 30% shorter. Bloat aside, Nier deserves all the love it’s received this year. This is an RPG with good writing, a stellar soundtrack, and some strong questions about what it means to be a robot.
Best of 2017 Awards
/r/JRPG Best of 2017: Results
JRPG OF THE YEAR - Persona 5
Runner-Up - NieR: Automata
The Game Awards 2017:
Kotaku, IGN, Reddit and The Game Awards are some of the biggest mainstream outlets I can think of.
And on Square-Enix's official store:
"Invaders from another world attack without warning - unleashing the machine lifeforms. To break the deadlock, a new breed of android infantry is sent into the fray: the YoRHa squad. Highly-acclaimed and award-winning NieR:Automata is a fresh take on the action role-playing game (RPG) genre that gracefully blends mesmerising action with a captivating story."
I came across a few other lesser known sites along the way that listed it under Jrpg/Rpg as well that I didn't post above, but yeah, I think Square Enix's definition is what most people go by. A Japanese action RPG. Unless perhaps they've only seen the beginning Demo section of the game, at which point it's easy to think it'd be closer to something like Devil May Cry.
Well.. that was for the most part my attempt to give the absolute lack of mention to it before your post some kind of justification! But regardless, I personally don't know how I'd classify Nier A.
I guess I view it as an open world(ish) hack and slash with a fair bit of RPG and SHMUP elements.