Not in the last couple of years, but 11 years ago when it was introduced, probably.
Airplay was already around when the 30 pin connecter was still there, and they were also popular back then. I remember using a 30 pin connecter speaker with a 30 pin to lightning connecter also because it could charge my phone at the same time.
Realistically, the market for such accessories is likely fairly limited, but that in the end also results in a higher price (no scale in the market after all).