Needs a smart phone..
How to connect your heart rate monitor to the Apple TV?
With ZWIFT
Connecting your heart rate monitor (HRM) to the Apple TV when running Zwift is easy. Just use Zwift companion app on your phone and connect the HRM to it. The app will act as a bridge and transmit the HR data to Zwift. It will then be displayed on the Apple TV in-game.
You can download Zwift companion app
here; it’s available on both iOS and Android. Once you launch Zwift on your Apple TV, then open Zwift Companion on your phone. Enable the Bluetooth transmission in the top right corner of the App. Then, on the Apple TV, on the Zwift pairing menu, you should see your heart rate monitor appear.
Make sure that your HRM is active: if it’s a strap you should be wearing it when trying to connect it to Zwift, else if you are recording the HR based on your Garmin watch or another watch, make sure that the watch is in broadcast HR mode.