I use my Android tablet/phone as a second screen and play media on it (YouTube videos, music, etc.) and send the audio to my PC where I listen to it through headphones. I use the application "Bluetooth audio receiver" from the Microsoft store.
How do I use my PC to send a start/stop signal (AVRCP) to the android device?
Yes, of course you can tap on the screen for this, but I prefer tactile feedback from physical buttons. Besides, sometimes I still need to unlock the device first...
P.S. If necessary, I do not mind changing the application to transmit the sound itself.