Hi @MikeDave
Thank you for reaching us and welcome to the Sonos Community and letting us know about your concern. Let me help you out with this.
We appreciate you for sharing your feedback on this. iOS does not natively provide a way to control devices on your home network from the lock screen in iOS, the controls are only available for audio being played on the device itself. The Sonos implementation of lock screen controls was built in a way that's no longer viable and with the launch of AirPlay 2 on Sonos, we made the decision to remove the functionality in households that use AirPlay. Disable the AirPlay feature on all non-Sonos AirPlay endpoints to allow lock screen controls is a limitation.
Use AirPlay on your iPhone, iPad, or Mac to stream your favorite music, movies, podcasts, and other audio directly to your Sonos products. Sonos is only compatible with AirPlay 2. Check if your Apple devices can play AirPlay 2 audio in Apple’s AirPlay article.
Please let me know if you have any further questions or concerns, we'll be glad to assist you.