That's a shock - never seen that before! Looks like there are two hidden apps on the watch that only appear when you launch them. Might try to do that...

As for sending data to them, that would require a new interface in Rockpool. Afaik there's no other way to send data like that to the watch without creating your own watch app. You'd include a javascript phone-side portion of the app, which could then retrieve data. Otherwise it's all timeline pins.