systemdgenie VS Solaar

SystemdGenie is quite nice.

Not exactly what you're asking for, but maybe this will suffice? https://github.com/KDE/systemdgenie

There is systemdgenie. It has a kind of pseudo-repository (here) with a link to another repository. I call one repository 'pseudo-' (and it is here) because it has no issue tracker and because it seems to direct one, via a link, to another repository; but the link is broken. And when I try to install the program, using the instructions and code on the 'pseudo-repository' (which does contain those things), a seemingly essential step in the process (the one starting cmake -DCMAKE_INSTALL_PREFIX - I can't give the whole command here because it breaks Reddit's formatting).

If it's got the Logitech unifying receiver, it won't work outta the box. You gotta download Solaar

- Solaar: Device manager for Logitech devices (connected via Unifying, Bolt, Lightspeed or Nano receivers + some connected via USB cable / Bluetooth)

from: https://pwr-solaar.github.io/Solaar/

Depending on your mouse, Solaar could do the job. I use it in combination to trigger Fly-Pie.

Now moving on to the Linux part. Do you use gnome/kde? Or some tiling DE? I use Solaar and it's lovely! M720 has a perfectly placed gestures button. I use it to move my windows to left/right monitors and switch between upper/lower desktop spaces. The gesture button works flawlessly when you set up solaar correctly.

I've been beating my head against the wall trying to figure out why this isn't working as I expect. I'm trying to make a user service to run solaar so that my logitech mouse's scroll wheel behaves like I want without having to open the app manually. The software itself provides a .desktop file for autostart, and I used this as a basis.

I've used Solaar for my MX Master 3, works great. https://pwr-solaar.github.io/Solaar/

We don't officially support wireless keyboards or mice for infosec, environmental, and supportability reasons. But if we had to, the established Logitech Unifying and newer Logitech Bolt ecosystem allow for ready re-pairing of dongles with peripherals. Logitech Unifying is fully functional under Linux with solaar from your distro's repos. You have to be astute when buying, to always look for a picture of the dongle with the orange Unifying logo or the safety-yellow Bolt logo, however. If the logo isn't on the packaging or in the promo picture, I can assure you that you will not get a Unifying or Bolt dongle.

Have you tried Solaar?