Windows 10: Windows 10 not showing Bluetooth Headphones

my windows 10 device bluettoth is not detecting my oneplus bullets wireless z after i updated it to 21H2

:)

 

bluetooth headphones

setting up win10 Bluetooth and my Bluetooth headphones work fine ,but every time I reconnect the headphones I have to delete them from Bluetooth settings and let win10 pickup the headphones again ,before they will pair ,then win10 want to reboot to add the headphones ,I reboot and they work fine ,but next time I plug the headphone in again they will not pair ,don't even get an option to pair till I delete the head phones from the list ,, any suggestions ,, thank

 

Bluetooth in windows 10

My computer specs are as listed in the profile. I think all of you guys are correct. I don't have built-in Bluetooth in mobo.

I contacted skull candy headphones and thy have told me if I do not have built-in Bluetooth, I would need a dongle which supports at least a2dp. I do not know what the heck that means. I have a feeling I would need more than a cheap dongle.

Anyone suggest some a2dp adapters. I searched but don't know what a2dp is so couldn't make a decision

 

Bluetooth in windows 10

USB-BT211 Mini Bluetooth Dongle - Support

• Support A2DP for Wireless Stereo Music Playback

Edit: This is a dongle with old BT version I see now, but I'm sure you can find a Asus BT4.0 version.

Edit2:

@aasim1111 I have this one, it doesn't show that it supports A2DP in the specs but I think it'll work, otherwise send a mail to Asus and ask.
USB-BT400｜Adapters｜ASUS Global