Running cadence on Apple Watch

Hello, my Apple Watch tracks and reports running cadence. Why can’t Zwift pull this in alongside HR?

Does your Apple watch broadcast running cadence?

Yep: Using Apple Watch running cadence and pace alerts in watchOS 5 - 9to5Mac

In fact, there’s a third party app that will broadcast it to Zwift, but this is something that Zwift should do natively. AppyAppster