Can an ArcGIS Online map embedded on a website be edited?
Last Published: April 26, 2020
No, an ArcGIS Online map embedded on a website cannot be edited. When embedding a web map, users can make limited changes to the display of the web map but are not able to add points or adjust map attributes. This is a functionality limitation.
However, as an alternative to making changes in an embedded map on a website, create a web application with editing capabilities in ArcGIS Online. Refer to the following links for more information on creating a web map application, ArcGIS Online Help: Create apps from maps.