I've run into an issue where I have a map that has layers that we serve up to ArcGIS Online using ArcMap. The layers show in the map, Web AppBuilder, and Dashboard, but won't appear in Experience Builder. Is this a known limitation or is there certain settings/requirements that will allow them to work.
What type of layers are in the webmap? If you can take a screenshot of your console if there are any errors or if you can share that webmap with me that would be great. My username is dmart in case you can share.