It was almost premium. Still didn't had Pros camera.

Real example was Pixel until version 4. The only difference between smaller and bigger versions was the obvious screen and battery.

That’s splitting hairs. Premium ≠ Best in all components. And the iPhone 12 and 13 have sold pretty well by all reports so the screen size is the only differentiator feature wise. (And battery which is unavoidable)

And Google also stopped selling smaller phones…

non-mini iPhone 12/13 are sold well enough.