My friend who works at Apple taught me this nearly life-changing hack. I have always struggled to precisely position the cursor on my iPhone. So here is the fix:
If you click and hold the space bar, you can move the cursor almost like a mouse.
You’ll feel a haptic response, the cursor will pulse, and then, voilà, you can slide your finger on the space key as you would a mouse to navigate up, down, and diagonally.
This doesn’t seem to be advertised much, but it’s part of Apple’s 3D Touch. Apparently it’s been around since 2015 and works on iPhone 6 through iPhone X, excluding iPhone SE and iPhone XR. It also seems to work on my iPad which runs iPadOS 15.3.1.
Update: just got an iPhone 13 and this hack works on it as well!

Haptic Touch replaces 3D Touch on the newest iPhones.
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