How to set dimensions for all phones equal?

Question

Unity

I still don’t understand how to make a scene so that it looks the same in size on all phones, I did it for my phone, and when I checked it on another, the difference was in size, somewhere the borders are close, somewhere there are gaps.
in canvas I have render mode - overlay , as I understand it, in this way it should adapt to all resolutions for all phones.
canvas scaler - constant pixel
size

Answer 1

Nowhere will be the same size, you need to take a portrait ratio for example 9:16 (720 * 1280) and follow it
canvas scaler - Scale with screen size