Just, be aware that every time you turn ON location service/GPS setting on your smartphone, let's say for using Uber app or Google Maps, Facebook (app) will start tracking your location.

Because, installing the Facebook app on your Android and iOS smartphones automatically gives the social media company your rightful consent to collect the history of your precise location.

Users can manually turn Facebook's Location History option OFF from the app settings

Unfortunately, disabling Location History would also break some Facebook features that rely on location data like checking into a nearby location, tagging locations in an uploaded photo

https://thehackernews.com/2019/02/facebook-location-tracking.html