Hello,
I created and used a custom diagram template in my local mobile geodatabase and used it for my subnetwork definition.
In ArcGIS Pro when working with the mobile gdb, I can see the template in the list :

After copying the whole UN in my enterprise geodatabase, however, the behavior is different.
System diagram for all my subnetworks are working well, and I can search for them in Pro, but I don't see the template in the list anymore.
In the REST interface, I can only see the standard list of three templates :

But my custom template is visible in the diagramDataset endpoint

I also tried to reimport the template files with the Import Diagram Template Definition toolbox, but nothing changed, despite I could see my previous custom template in the list.
