I've tested [nonprism-testing/geoclue] (locally built).
As of writing this, my system is up to date:

$ sudo pacman -Syu
...
warning: geoclue: local (2.5.5+6+gea52170-1.nonprism1) is newer than extra (2.5.5+6+gea52170-1)
...

All tests were performed with an active internet connection and without Tor, VPN,
I have evaluated the affected packages in [extra] ([nonprism] was NOT enabled):

$ sudo pacman -Syuu
$ sudo pacman -U geoclue-2.5.5+6+gea52170-1.nonprism1-x86_64.pkg.tar.xz
$ sudo pacman -S gnome-maps gnome-weather empathy gnome-settings-daemon redshift webkit2gtk

For the gnome apps I don't know how to enable more specific debug output. The options seem all about GUI stuff.

• gnome-weather
  Location was not available and had to be set manually. See screenshot attached.

• gnome-maps
  Location was not available (button was greyed out). See screenshot attached.

• redshift
  Location is not found.
  

  redshift -r -m dummy
  Trying location provider `geoclue2'...
  Using provider `geoclue2'.
  WARNING: Using dummy gamma method! Display will not be affected by this gamma method.
  Waiting for initial location to become available...
  ^Cpoll: Interrupted system call
  Unable to get location from provider.
  

  
  Running with option -l is fine.

• gnome-settings-daemon
  Again no idea how to test this. However gnome runs fine.

So my conclusion is that [nonprism-testing/geoclue] does a pretty good job.

Please let me know if you need any further information.