How to make fixed content above the iOS keyboard?

Question

I can only find questions where people have the opposite problem.

I want my fixed content to go above the iOS keyboard. Problem Image: I want iOS to behave like Android.

Is there an easy way to achieve this?

Parent element:

position:fixed;
top: 0;
left 0;
right: 0;
bottom: 0;
width: 100%;
height: 100%;

Button

position:fixed;
left 0;
right: 0;
bottom: 0;
width: 100%;
height: 5rem;