Can I connect AirPods to a Bluetooth transmitter to pair with non-Apple device?

How do I (Bluetooth) pair my AirPods Pro 2 with a Bluetooth wireless transmitter, the kind that plugs into an audio jack (as, for example, in an airline entertainment system or a CD player)?

When I pair my iPhone to the AirPods, I can use the touch screen to connect/disconnect, but in this case there is no screen. How do I put the AirPods in pairing mode?

[Re-Titled by Moderator]