There are people reverse engineering the glasses right now (I have a pair):
https://github.com/wheaney/XRLinuxDriver
One of my longshot projects is to convert my framework laptop main board to exactly this. I basically use the glasses a lot more than the screen at this point (it's more convenient at night before bed)
I also use krunner but unless I've misconfigured it, I wouldn't call it fast (and it freezes a lot since it runs in the background).
Compared to when I used rofi on hyprland (which was really fast). I'm back on KDE cause of the hyprland toxicity debacle, and honesty the only thing that isn't fast, customizable, and reliable is the app runner.
Krunner also has a weird quirk where as it loads entries, it will change the currently selected option so when you hit Enter, it will actually not execute the one you want, but instead run "Install "
Talking out loud I should probably bind alt+space to back to rofi or try Fuzzel or something