Tapping in a text field used to just put the cursor there. Double tapping would select the word, and triple tapping would select the whole sentence. At least I think that’s how it was. Now tapping almost always selects the word (sometimes it weirdly doesn’t, and it’ll select the first word of the next line if you tap the end of the line above… why would that be intended?).

If you want to place the cursor between two words, it best to use the cursor by long pressing the space bar or physically dragging the cursor (unless you’re very good with where you tap). If you want to add some text to a middle of a sentence, you’ll have to think very carefully about how to accomplish that without redundantly needing to retype some words that you had intended to keep.

Also, if an incorrect word gets auto-typed, hitting delete just removes the whole word instead of allowing you to just delete something like the last letter.