If you embed the Web AppBuilder app in a simple web page is the related records widget available?
Can you post a link to your WAB app and story map to help us troubleshoot?
I figure out the problem. When I use embed option by default it mark the option "Load page over a secure connection (HTTPS)
After remove the s from the embedded code
and the option it worked fine. I was able to see the option show related Records.
Thanks for your help!
I have tried to add a url and an embed page in the Story map Journal with the same result
Story Map, in the 5th bullet https://atlaspr.maps.arcgis.com/apps/MapJournal/index.html?appid=21b5e229dc504c1cb6e32accc3cd61d1
Web Appbuilder app ArcGIS Web Application
Thanks for your help.