It exists and is called Limo.

https://flathub.org/en/apps/io.github.limo_app.limo

It's basically linux native MO2.

I've been using it for New Vegas, and Cyberpunk 77, for almost two years now.

Works pretty good!

Don't have to do some kind of wacky wine/proton set up for each instance of MO2.

EDIT:

If you prefer non flatpak, though the flatpak is the officially supported version, you can do a other kinds of installs:

https://github.com/limo-app/limo

It's also on Arch via the AUR, source is on github, has build instructions, they seem to be oriented around Debian based OS's, but you could probably/maybe figure it out for other OS's as well?