+xA bit of Googling shows that Windy does indeed use GPS along with all other sources if needed so my apologies for that. You learn something every day.
Both my Samsung A9's took a software update this morning (UI. 8 / Android 16) and both ran SD fine on a short flight this afternoon using the built in 'Location Services'.
All good, I appreciate that you were trying to troubleshoot! More often than not simple troubleshooting resolves such issues.. In this case it doesn't seem to be that simple.
Active Tab 3 is stuck on Android 13/UI 5.1.1 which is the latest supported.
Update - tested again today and GPS is working normally again!