Hi @Rolfen,
Is it possible to monitor an ASP.Net Core application hosted in Azure App Service? How?
Yes, it's possible. The setup doc you linked shows you how to turn on the agent for an ASP.NET Core application. It doesn't matter where the application runs, it can be an Azure App Service, on premise, AWS, GCP, the hosting model doesn't matter, that's why we don't have a doc per hosting. As long as the agent can send data to the APM Server, it should work.
If you tried it and it doesn't work, it's worth looking at the troubleshooting section. One thing that comes to my mind: make sure the url&port to the APM Server is open from the monitored application.