Organic Maps is available on Linux! It's on flatpak and several package repos (but not apt). I don't know how long it's been there — I just discovered it.
The splash screen cautions that this Linux beta doesn't have parity with the mobile apps yet, but it's still a huge leap over Gnome Maps. Vector rendering, so you can zoom in as far as you want, and free / open source / not shitty (notwithstanding the big scary EULA, which just contains all the OSS licenses for all the pieces).
cool. Would be great if some Linux Distributions would add it to their packages