Displaying grafana object in HABPANEL in Cloud app

I can display Grafana chart in Habpanel no problem. However it does not display in the same habpanel dashboard in the openhab cloud app on my phone. Just a blank widget. Does anyone know if this is possible?

Hardware is rpi3, Android 9.

Possible? Yes.

Practical? No.

You would need to put your Grafana instance on the internet. myopenhab.org does not serve as a generic proxy to everything running on your home network. It only provides access to openHAB.