I installed a new 3-spoke MF steering wheel with paddles in my 11β A8L! All buttons work, and no warnings!
For those who are interested in doing this themselves:
I used a steering wheel for a B8.5 A4. These differ from the 4H A8 wheels, but it still fit.
I bought a B8.5 8K airbag from an A4, switched out the airbag cover (there are tutorials on how to do this on YouTube), and re-used the harness from my OEM airbag. Paddles are transferred from my OEM wheel. The buttons are for an A4.
It all works without issue, horn, paddles, and buttons all work, even the programmable joker button.
Let me know your thoughts.