Finally found one: https://meaningcrafters.com/produit/powerbank-alex/
I don't speak French but placing the order was quite straightforward. Shipping costs were a bit high, but totally worth it. ~~Highly recommended!~~
Edit: Probably too good to be true, see discussion below...
I dunno man: the owner of the company https://www.linkedin.com/in/jean-eudes-mosnier-5471a213 lives in Guangdong and works as a sales executive for a Chinese electronics manufacturer
@exchange12rocks@lemm.ee : Thanks for looking deeper into it. While I don't have access to LI, that's suspicious indeed. So either they're lying outright, or maybe final assembly happens in France at least. I guess that's the best you can hope for nowadays. Very disappointing.