If the fully-functioning Gnome Weather widget can now only be installed via Flatpak, maybe it should be taken out of the Gnome Panel as an installable widget? It’s misleading to have it there if the version that gets installed is crippleware, yeah?!
(My vote, though, would be to have the one installable via the Gnome Panel be full-fledged/non-crippled, like in many years past… I miss my Weather Widget! It’s the first thing I activate in my Ubuntu Gnome Panel on all my machines.)
To back up, the version installable via the Gnome Panel at top does not pull weather data for all the Locations in its configuration. In my case, none of the Baltimore, Maryland, USA Locations work any more. If you want a Gnome Weather widget whose Locations actually pull data, it is my understanding that you need to install the version that is deployed as a FlatPak.)