Embedded App on POS - UI-Modal with app-bridge-react, landscape (Android) and debugging?

[ambstrat]

I have a working embedded app that displays a summary list and allows the user to click on a row and see a detailed modal window. I use the "app-bridge-react" ui-modal for the modal.

This app would be useful to my customer at point of sale, so I updated my toml file to:

[pos]
embedded = true

and was able to install a tile on the POS for the app. Cool so far.

A few questions:

(1) On my Android phone, the app doesn't respect my phone's auto-rotate setting - and because of this I can't see the right portion of my list window. I can't scroll or shrink to make it visible either. Is this fixable? My specific case aside, can we control orientation?

(2) The modal window doesn't show on the POS - I just have a never-ending progress indicator spinning. Should I expect "app-bridge-react" components to work as they do on a browser?

(3) How does one debug apps running on POS device? Can I see console log or connect into the PC with a browser to observe?

(4) It seems the app is intended to run unchanged on the POS device. Is there an idea of conditional behavior depending on the platform? That is, at runtime my app can detect the platform and do something different? Or is it  just an iFrame running on the POS?

Thanks!