Switch it on, restart the app and you will have root access on your virtual device. Inside developer options, you will get a toggle named ROOT under Debugging section.
You will have to enable Developer options which can be done by opening Settings app inside VMOS and tapping on Build number seven times. However, you will not be getting root access by default in the app. Root support is undoubtedly the feature that urged me to try this app out and trust me, you will not be disappointed with it.