we have one customer using Azure APP service that's part of Azure APP service Environment , there's no option to deploy OneAgent extension on APP service directly since it's part of APP service Environment.
Azure Monitor integration with Dynatrace already in-place.
how we can enable oneAgent for APP service part of Service Environment ?
There is a OneAgent site extension for Azure App Servies: here is the documentation.
Thanks @pahofmann , I am aware of that, but that Azure APP service part of service environment and when checking extension it's not available