- Edited
Matthai But KDE Connect only works in the local network - not remote. So you may find your phone under a pillow in your house or appartment - but not somewhere outdoors.
Well, unless you're connected to your home network via VPN all the time.
A FOSS alternative to Google's Find My Device service seems to be https://f-droid.org/de/packages/de.nulide.findmydevice/ - but I haven't tried it out yet.