There is descriptive text before/after the map that details the important information relayed in the map.
To determine if your map has created a keyboard trap, you must test the map. This can be done by pressing the tab button on your keyboard and watching tab focus go down the page. If you are able to tab out of the map, the map is not a keyboard trap.
Google Map Text Alternatives
Along with the map, there should be explanations of the key points the map is trying to relay.
General Use Cases for an Embedded Google Map: