There is a Start menu icon available on Windows, or use the run script in the install location. The Surface Duo 2 emulator will not automatically appear in the Android Studio device list nor in AVD Manager, you should start it manually. See Get the Surface Duo 2 emulator if you don't yet have the tools installed. The emulator simulates postures, gestures, hinge angle, pen pressure, multi-touch, mimicking the seam between the two screens, and more. With the Surface Duo 2 image and the Android Emulator you can test your app without access to a physical device.

Get started with the Surface Duo 2 emulator