Disable split view for both IOS & Android

Hello! This is my first topic here so if I choosed the wrong cateogry or tag forgive me.

I want to disable split view for both IOS & Android. I already found a way to do it by in app.json file for IOS and it’s not working. Maybe it’s only works in build but I don’t know and I’m here to learn. Here’s what it’s look like.

"ios": {
      "requireFullScreen": true

And like I said, it’s not works. I’m testing this on iPad 7th generation with IOS 14.6
I didn’t find any solution for android.