What? I’m using neon with Nvidia’s v550 driver right now. I’ll try switching switching to v555 driver as linked in OP via apt once it available through Nvidia’s (compatible) debian repos for Ubuntu.

https://neon.kde.org ? Not sure if it’s received this patch yet, but it ships the latest version of KDE 6.

Are the two Linux devices on the same IP subnet?
Are any of the other KDE connect features working?

I do as well. I really appreciate the information density, key bindings, and optional web UI. Although I found if I leave glance is running for a prolonged amount of time, it has a tendency to crash from some python issue I haven’t dissected yet, as it takes so much time to reproduce.