Currently I use the Google Maps API to generate a map with a marker (given a lat/long set of coordinates) to a given location. In AMP HTML, it appears the way to do this currently is using the amp-iframe extension https://github.com/ampproject/amphtml/tree/master/extensions. The issue is you cannot use Google Maps embed code with coordinates unless you are using a 'view' map. I don't have a Place ID, so I cannot use the Place mode. I can't use 'View' mode, since that has no markers. I've looked high and low at https://developers.google.com/maps/documentation/embed/guide#overview
What is the proper way to include a Google Map on an AMP HTML page that has a marker placed on it? I don't see any existing questions about this on the forum or in Github issues, so I'm curious if anyone else has run into this same scenario.