Why would it need to pair with the Apple Watch? Wouldn’t it just feed data to the Garmin fitness app for iOS? It would be up to Garmin to offer an Apple Watch app so you could see your cadence on your watch. The Garmin folks would probably rather sell you one of their watches. 😉
Actually I just realized what I think you mean. I’m not an LTE Apple Watch user, so I forget that people often use them and leave iPhone at home. The iPhone can of course connect to external fitness trackers via Bluetooth, but can the Apple Watch do the same with a Watch-to-foot pod BT connection?
Does anyone know?