Paint the Town
Because that title isn't an artist's name, we get an unfiltered map. Make sure the HTML anchor is set to 'maptitle'.
The map below is in an empty colour block. It uses the custom CSS element ID 'map' to let javascript know to put the map in it. You can make any element into the map by giving it this id or anchor. Use WordPress' block formatting options to choose how big the map is. You can also put the colour block into other blocks to use group or column formatting — just make sure to set the ID on the correct element.
The custom html block below is used to create the drop down. Remove and add <option> lines to modify who appears in the dropdown menu. Make sure that the value="" matches exactly how the artist's name appears in the database. If you want to use a WordPress plugin to make the dropdown look different or otherwise replace this, make sure that it uses the HTML anchor 'id'. (Here it's directly set through id="id" in the HTML)
This HTML block also contains a div holding the snackbar, which is the alert that appears if someone tries to submit incomplete data. You won't need to modify that.
Finally, this button submits the data. As this is a button, we instead need to go to the custom CSS option and set its element ID to "update_coord".