Yes, three different processes -- a UI front-end, and two different REST service apps. This is a very normal and probably deployment scenario for a real-world deployment. (We also have SignalR running with hubs originating from our REST app, fully integrated with the UI; I mention this only to point out that tight cross-app integration is clearly a reasonable proposition.)
We also rely heavily on OData v4 on our REST services.
OData v4 is not even on the roadmap yet for ASP.NET Core, yet OData v4 has proven to be very, VERY dependent upon query monitoring and tuning, exactly the ideal use case for Glimspe.
So, for now, Glimpse in all its forms is completely crippled, without regard to any willingness to migrate to anything, without having to merge our apps, thus compromising their architecture (scalability etc).
Jon