Yes, I have tried generating ABAP code using GitHub copilot & we don't have to install any extensions as such in VS code, GitHub copilot supports out of the box code generation for ABAP.
Also, recently GitHub copilot Chat features is also introduced...
This TechEd has shared lot of insights and innovations on how AI is revolutionizing SAP solutions with Joule, Vector engine, AI business service, ISLM, Generative AI hub.Joule