Best solution to deal with keyboard and spacing?

[stanislavlysenko0912]

I have a modal window that is 0.8 high.
On which I would like to place something like this tree:
HeaderWidget
Spacer
And other widgets that would be at the bottom of the screen.

But when the keyboard appears - all widgets go up, but the main problem is that the Header goes up as well, and hides.
But essentially I want the indentation between HeaderWidget and other widgets to be reduced, instead of hiding HeaderWidget.

What is the best way to realize this?

Also an additional question, can I increase the size of the modal window to 1.0 when the keyboard appears?

Thanks for earlier. Also thanks for such a cool library 👍