Access the Map that contains the photos that you would like to move to your phone gallery and swipe up from the bottom of your screen to see the details for the map and click on the photos bar.

On the following screen you will see all of the photos for the map, to select the photos that you want to move press on the photo tile until you see the tick appear.

At the top of the screen click on the Save to gallery icon.

Click on Save to gallery.

You will then receive a message to confirm the save.