The bigger the phone gets the harder it is to reach bottom controls that are further from your thumb. Maybe it makes more sense to put icons closer to each other in the middle - as a floating island.
Discussion
Put everything that you need towards the bottom. That's what I do works best from my testing. Most people hold their phones from the bottom.
you know you can shift the keyboard left and right by holding the fn/world button in bottom left ?

Sad the 13 mini was the final one.
Me: I refuse to ever use two hands like a child.
Everyone: treats you like a child because they think you’re using an iphone 6.
Haha I just upgraded to 16 pro max because that’s where I watch most of my Netflix and wanted a bigger screen
I have an iPhone mini now and I complain about how huge it is. I want to switch to Graphene but the pixels are so enormous, i couldnt handle it
Got the mini, some young whippersnapper asked me at work “why is your phone so small?” 😅😭