Available blutooth devices not showing

[ABG]

This user just posted what worked for him for adding permissions to BlueTooth.

App not connecting with classic bluetooth to android 13 phone

This is the simple and reliable way to connect an Android 13 phone using classic bluetooth to an Arduino or ESP32. Anything unnecessary to the basic function has been stripped out. Click the listpicker and it sends "hello" to the remote device. Much of this little was from Anke's connector widget for which help I am very grateful. Following a deeply offensive message from Patryk, I have withdrawn the solution

Could you try it and tell us if it worked for you?