In this video, we highlight the steps to enable branch versioning on feature classes participating in a many-to-many relationship class with the purpose of consuming the related data via services.  

Supporting Materials:

Help documentation: https://pro.arcgis.com/en/pro-app/latest/help/data/relationships/relationships-and-arcgis.htm

Improve campsite data quality using a relationship class learn lesson: https://learn.arcgis.com/en/projects/improve-campsite-data-quality-using-a-relationship-class/

Explore a many-to-many relationship class blog article: https://www.esri.com/arcgis-blog/products/arcgis-pro/data-management/explore-a-many-to-many-relationship-class/