Just putting it put there because I can’t reply to any of the posts asking about the apple maps taking too much space on their phone.
Check the "Synced" Data or Cache: If you re-download the app temporarily, open Google Maps, tap your profile picture/initials in the top right, go to Settings > About, terms & privacy, and see if there is an option to Clear application data.
I contacted customer support and they helped me and now all my GBs of unnecessary apple maps data is gone.
