So, I normally use SDDM+Plasma for my desktop, but thanks to the whole problem with nvidia-prime drivers I was forced to switch to GDM3.

I usually (yes, usually) manage to start Plasma without a problem through GDM3, but then NetworkManager-Plasma package misbehaves. The Widget doesn't show any available wireless connection or previously used VPNs. If I disable nvidia-prime and restart with SDDM, it all works normally.

Is there any Plasma service that one needs to start manually when using GDM3?