Hello @tarun_kumar_aga ,
On this page Technology support - Node.js you can see all the Node.js frameworks supported by Dynatrace, and Koa isn't there at the moment.
In this case, you can check out the OneAgent SDK - it enables you to instrument your application manually to extend end-to-end visibility for frameworks and technologies for which there is no code module available yet. With the SDK, you get full access to all analysis and monitoring functionality, including auto-baselining and AI-based root cause analysis.
There is a large number of various frameworks (and different variants of them) out there in the wild, therefore not each framework is listed on the "technology support" page as "supported".
In general we support all (web) frameworks which are based on Node's internal modules. As for koa I'd consider it as "supported". At the moment there are no known gaps, which would require the usage of the OneAgent SDK.