Connecting Arduino Nano 360ESP with BLE to ANdroid phone App

I'm trying to use MIT App Inventor to write an app to connect Android phone to an Arduino Nano ESP32. I can't find any examples or enough good code examples to make it happen. The Nano ESP32 is a relatively new, low cost small board that can control real world electrical elements. It would be good to have some examples and tutorials around this applicaiton.
Stan Stephenson,
[mod edit - personal info removed]