I would like to make public accessable AED´s visible in the OSM. But there is not yet a symbol for it. I suggest to make one!! How can I afford that?
The simple answer is: Either make your own map, or use something that allows you to select particular POIs and display them.
For more information on what’s shown on the “standard” style and what is not (and why not) see this “help” question:
Using this “taginfo” link:
you can click on “overpass turbo” that allows you to display that item in a particular area.
See this example from openpoimap:
Edit: new website for marker collection!