How to correctly set element depth in react-native?

Question

React Native

Good afternoon to everyone who reads, I'm making an application on RN, and I had a problem with elements overlapping other elements, for example: I made a completely custom modal window and when it appears in the middle you can see the button that should be under it, the second example is also with a button and react navigation bottom tabs button should be above the middle tab menu, but it is below it.
Thank you all for your attention in advance.

Answer 1

Have you tried using a style to place your elements on different levels?

{
 zIndex:6
}

add modal window index 5 and button 6 then the button will be above the window and so on.