If you’d like to see what data your phone has been collecting about your movements here’s how:
You can see what Apple refers to as your ‘Significant Locations’ by going to:
Settings > Privacy > Location Services >
Scroll down and select System Services > Significant Locations.
You will need to prove it’s you before being given this info e.g. by fingerprint scan, Face ID or typing in your passcode.
You can see what is referred to as ‘Your Timeline’ by:
Opening the Google Maps app.
Clicking on the menu (3 horizontal bars, top left)
Selecting ‘Your Timeline’.
At this point you may get an on-screen permissions message about turning tracking on or off.