This article explains how to turn off autocorrect on iPhone and iPad, and how to use spell check suggestions to make corrections with autocorrect turned off. Instructions apply to iOS 15 and later, and iPadOS 15 and later.
How to Turn Off Auto-Correction and Predictive Text on Your iPad and iPhone (iOS15)
Autocorrect is a handy feature, but you might not want it turned on all the time. Despite all the good it can do and the time it saves, autocorrect mistakes can be embarrassing, frustrating, or unintentionally funny. Here's how to turn it off if you'd rather rely on your typing skills on your iPad or iPhone.
From your home screen, tap the Settings app.
Tap the Auto Correction switch to turn it off.