If you can find an apk I'm using Backitude (gaugler.backitude), notable for using location 'steals' when some other app gets location rather than directly querying on its own. I just have it write to a kml file locally, and another program syncs that folder to cloud storage 2x daily.

It's also capable of pinging a url with location data if you prefer.

Edit: this may be interesting from someone else actively using it for their own tracking and reporting (includes parsing scripts) https://petermolnar.net/location-tracking-without-server/