As @JayachandraSiddipeta hinted at, abstract classes got support in '25 and even then I’d still continue to argue Abstract classes in Constellation are not a best practice.
Viewing embedded data
Besides opening up that metaphorical can of worms, you’re need to is to see more details about embedded data? I have not seen anyone create a preview on embedded data (OOTB, without a DX Component) so I can only talk to ways you might achieve it in Constellation.
Infinity '26 solves this with Review embedded data rows in modal . A great feature, well outlined by @LantzAndreas
Prior to '26, I would be looking at using Insights and Embedded Data to show the data needed - it doesn’t give you all the UI View control you’d like but does at least get you the data. (see Some insights into Insights (and Explore Data)