The map displayed on the Store Finder page is supplied by Google Maps. If you click on the Google symbol at the bottom of the map, you'll be taken to Google Maps directly. From there, Google Maps will be able to automatically pick up your location (if permissions are granted) and can then show you the nearest Three stores to your current location. You can use the typical Google Map functions from here.
It is worth noting that Google Maps is a separate App owned and operated by Google. As a result we have no control over functionality provided within Google Maps. Therefore we cannot support any issues with the Google Maps itself.