So... Took the leap a month or so back and got a Pixel 7 Pro with the intent of putting GrapheneOS on it. So far everything has been going pretty well... with the primary exception of weather apps, of all things.
It's not that I can't find or install them (did have one or two that kept crashing immediately on load) but that none of them, not a one, can seem to make use of the GPS for location specific features.
As far as I know, GPS / location permissions have been enabled for the apps (most recent / current is 'Shadow Weather'). Other apps such as Magic Earth, GPS Test and GPS Cockpit all seem to work fine, and show what appears to be current updated information. But not the weather apps.