Isn't that one of the motivating factors for a foldable phone? That you can have a smaller phone in your pocket or when checking notifications and have it be bigger during full-on use?I'm personally looking for a smaller phone. Not a larger one.
I'd buy a foldable iPhone in a minute IFF the folded version was basically a full iPhone 4 in terms of screen size AND the folded phone was no thicker than a current iPhone 13 AND MOST IMPORTANTLY it was reliable, which the current batch of Samsung and Huawei phones aren't. With reliable I mean the screen and folding/hinge mechanism doesn't deteriorate over a 5 year period of daily use.