Settings > General > Keyboards, near the bottom there is a toggle for Predictive.

the unfortunate thing about this is you lose the three suggested words at the top of the keyboard if you want to get rid of the rewrite feature.

the suggested words are sometimes not correct, but jesus ducking christ just let me opt in if it’s useful in the moment!

I set up an auto-correct for 'ducking' to replace it back to what you actually want to say.

Also whilst Apple is reading this, please stop changing "were" to "we're" out of context. Ugh.