To work with emulator devices:

In your Visual Studio code, install this extension: Android iOS Emulator.

Prerequisites for using Android emulator devices:

I considered it a GENERAL RULE:

The API level of the target device is important, because your app doesn't run on a system image with an API level that's lower than the one required by your app, as specified in the minSdk attribute in the app manifest file. For more information about the relationship between system API level and minSdk, see Version your app.

To learn more, visit this link: Create and manage virtual devices