I go through this same thought process (and hopeful web search) about the demise of small phones every few months but still can't bring myself to give up on my requirement of a smartphone I can use one-handed.

So I make do with a Unihertz Titan Pocket and its deeply-compromised experience (excellent keyboard and nifty programmable buttons notwithstanding), desperately hoping that either they'll eventually make a small phone with at least mid-range specs or some other company will do the same.

https://www.theverge.com/23913658/best-small-phone-dead-iphone-mini-z-flip-pixel-8