My understanding is you have to create a special separate panel for your small screens. They are working on an adaptive capability but it is not yet done.
The biggest problem is that you can not set a font size unit in any of the widgets. They are px or pt.
I have ‘font-size: 1.9vh;’ in the body element of the CSS and most buttons scale fine and look nice both on big and small screen. But if I use font size in the widgets that will brake everything when on mobile