Hello, @gizmoz , I am sharing my experience on iPhone 13. To view photos on your iPhone related to a specific Point of Interest (POI) , please enable the following settings:
iPhone Settings > Google Maps > Photos > Full Access
This setting will allow iPhone photos to display relevant photos for the selected location.
Please take a look at my topic;
I will be glad, to kindly share your feedback and also mark it as the solution.
P.S.:Please ensure you have the latest iOS version.
cc @WilfriedB