Some parts are imported but it‘s probably as European as possible at the moment. Details about production can be found here: https://www.nager-it.de/en/maus/fertigung. Unfortunately their shop seem to be only accessible in German.
credit: https://www.reddit.com/r/BuyFromEU/comments/1ngg5r6/fair_and_european_computer_mouse/
I'm a great fan of Logitech for gaming (G602) and office (MX Master 3). But from the looks of it, it's a different need. For a more mobile solution I once bought a Logitech M70, which is also a little bit curved, for a angled hand rest.