Unfortunately, A2DP Sink is not supported on the 20719B2.
The feature is supported on the 20721B2, which is the same HW device with firmware optimized for audio.
This support is described in the Technical Brief here:
The 20721 does have some additional engagement criteria, so you need to reach out to your local Cypress sales/Distributor.
I have also reached out to them on your behalf.
CYW20719B1 and CYW20719B2 do not support A2DP sink functionality. This is already mentioned here: WICED Bluetooth Software Features
We apologize for the 'link is dead' error; This is a technical glitch due to Cypress-Infineon migration process. Please find difference between CYW20719B1 and CYW20719B2 here: Change List CYW20719-B1 and CYW20719-B2
We have different modules available using CYW20706 which can be used to replace the CYBT-413034-02 modules you are using. However, I dont think they will be pin-to-pin compatible with each other. You will need to make changes in your design.
If you are going for CYW20706, we have demo example available to demonstrate A2DP sink & source.
Moreover, I would suggest you to look at Cypress audio solution CYW20721. We also have modules available using CYW20721. Please check with your local Cypress team for more details on CYW20721 based modules.
We apologize for the inconvenience caused to you. Feel free to post your queries on Cypress Community, we will help to solve your doubts as fast as possible.