Hey there kathir208,
Thanks for reaching out to the Apple Support Communities.
We understand you're running into issues with pairing your AirPods Pro with the TaoTronics Bluetooth Wireless Transmitter, and we'd be happy to get you pointed in the right direction.
To get started, have you gone through all the steps listed in the following resource here: How to Use TaoTronics Bluetooth Wireless Transmitter & Adapter - TaoTronics
If so, then we'd recommend reaching out to TaoTronics support who may be able to provide some additional steps, and can confirm if the transmitter is compatible with the AirPods Pro.
For help with reaching out to TaoTronics support, check out this link here: Contact us - TaoTronics
We hope that helps.
Take care!