The trick to this is to attach a handle to the back of it. I'm using one that telescopes from the "popsockets" brand (I'm unaffiliated and have no idea how it compares with other brands). It makes it possible for me to access all parts of my screen holding it one handed. It should be a standard feature.

I want a handle on the back of my phone even less than I want a larger phone. I also refuse to use cases and any other contraption that adds further bulk.

I have had an excellent experience with the OhSnap grip. https://ohsnap.com/products/snap-grip It is significantly smaller than the popsocket and adds a strong magnet which can attach your phone to magnetic surfaces. It looks flimsy, but I've had it two years and even moved phones and it shows no signs of breaking.