https://support.google.com/maps/answer/14169818
https://blog.google/products/maps/updates-to-location-histor...
https://9to5google.com/2023/12/12/google-location-history-ti...
From the last link, importantly:
> Update 12/15: This change means that Google will no longer respond to geofence warrants from law enforcement that request information on all devices near a particular incident.
https://www.forbes.com/sites/cyrusfarivar/2023/12/14/google-...
https://9to5google.com/2019/04/13/google-android-location-hi...