We do have some pandeiros, but mixed in with drum kit and other percussion, not as standalone RealDrums. BUT, with the introduction of the "drum stems" feature with BB2022, you now CAN have the isolated pandeiro on it's own track. I made a little video here demonstrating:
That being said, it would probably still be a very good idea to actually have those pandeiros as actual RealDrums in the main list that you could just pick like any other RDs, so that's certainly something we could do.