If you are looking for your map on one of the build servers, your world will be listed as an ID coordinate. To get your world’s ID, type “/world info” while being present in your world. Once there, you can look up your world ID on the dynmap list.
To hide your world from dynmap, type “/world hide” and to show it on dynmap (default) type “/world show”.
You can also click on your playername on the dynmap list to take you directly to your location.