I just installed a 3rd party app, PV pro for solar power monitoring.
When I get to the initial setup for setting up a WiFi network (for the monitoring device, not the phone) it keeps searching and saying 'Failed to get WiFi list'. My phone is connected to WiFi and I can see my system list from this location.
I've never used this app before, so can't speak to it much, but is there some permission or protection I'm not aware of GrapheneOS that might interfere with this?