The easiest way is usually the most obvious - scope out your applications by lab and you’ll have your list. 
 

Better yet you can organize your labs by categories and have a viewable list that way too. 

Interesting. What’s the driving use case behind this? I ask because it seems like a potentially complicated way of going about letting folks know what can be expected in the lab environments. I’m sure you probably have some reasons that aren’t obvious to us reading the question. 

I’ll agree to this statement too.  I think the approach could be better though - like having your labs built out into smart groups so you can then scope apps and then poll that or make them available in Self Service so you can just go to one and see what’s available to that lab.  

Jamf doesn’t do really well on application reporting (especially usage from a reports standard), but some things are doable - just need to know exactly the “what” you’re going for.