I remain an irreductible fan of the one-hand theory, and therefore stick with an iPhone 13 mini. I might be late at the folding-phone revolution. Alas it seems we won't see any such phone that fits in a pant's pocket and that can be operated single-handedly. I am afraid that the 13 mini is the last of its kind. Yet many reports of people dropping their gigantic phones. Maybe that's a business model after all.
I had the 12 mini (before it I had an iPhone SE, then iPhone X, then the 12 mini), which unfortunately did not work for me because the battery drained too fast. Really hope you're wrong and we do eventually get some more one-handed phones in the future, especially once battery tech evolves.
Battery-saver on all iOS devices.