How to make LTE Apple Watch to get some sensor data from HA?

There is the companion App, which only updates every 15 minutes, and it doesn’t work over LTE network…

Using build-in browser(via shortcuts app), tried to display simple panel, no go. The build-in browser in Apple watch is limited, maybe problems of js engine, anyway, it will not login…so no HA lovelace…

One more thing I tried, appdaemon + dashboard add-on, same result, only label shows, no data… guess it the same problem due to watch browser limitation.

I am stuck, what else I can try? Thanks…