Hello, everybody,
I'm facing the same issue. I have a Galaxy Note 9 with a 18.5 to 9 screen factor, instead of the normal 16 to 9. When I developed my app, I turned off the Lock Aspect Ratio on the settings. With that my screen appears complete without that ugly black stripe at the bottom of my screen.
Now, reading the posts, I made reverse engineering, I saved a copy of my app with this control again on, and the issue was solved, the bottom screen fields scroll automatically over the mobile keyboard. I tested on an old iPhone 7 Plus and my app and the automatic scroll worked just fine. I can read what I'm typing on the text input field.
I have to figure out how can I get the best of the two worlds, get my Samsung screen complete used and get the scrolling on the bottom part automatically shifted up.