07/06/2021
https://www.howtogeek.com/714170/how-to-use-your-android-phone-as-a-bluetooth-mouse-or-keyboard/
You can use an Android device as a Bluetooth mouse or keyboard without installing anything on the connected device. This works for Windows, Macs, Chromebooks, smart TVs, and nearly any platform you could pair with a regular Bluetooth keyboard or mouse. Here’s how.