How to make sure field is shown on mobile device?

I have created a simple form with 5 fields and a button with Material-UI framework.

On the mobile I see the following problem: When field at the bottom of the form are selected - they are covered with mobile keyboard.

I want those fields to be centred, so user can see what he/she types.

This is my form: https://monosnap.com/file/gPnCIQni0x21B5sARi8JeFpcjECr69

p.s. I tried to add many <br /> below the button. It made some space, but field still not center/focussed.

How to do it?