Kindly goto Bluetooth settings and look for your Bluetooth headset click on that the goto properties and you will find permission allow it ,there you go ready 

Hi DearI my self had a same issue I don't want to change my phone but I tried to see how much difference do I have to pay or I will be getting it from them so I did try to trade my note 20 ultra 5g used barley 5 to 6 months with S21 plus I was shocke...

Yea so true and plus brightness when you're watching Netflix you can't increase the brightness it says its controlled by the application weird 樂

thanks guys