How can I fix Greek autocorrect on my iPhone 16 Pro Max?

Expressing or conveying visual experiences effectively through these forums may be challenging. The underlying visual issue on your iPhone cannot be accurately diagnosed online. Factors such as your iPhone's specific settings, visual defects, and potential hardware problems cannot be assessed through this method. For more personalized and in-depth assistance, I recommend securing a Genius Bar Reservation and exploring the various support options provided by Apple.

Get a Genius Bar Reservation and Apple Support Options - Apple

When you encounter issues with your Apple devices, the Genius Bar at Apple Retail Stores is the go-to place for expert assistance. The Genius Bar is staffed by knowledgeable Apple employees, often referred to as "Geniuses," who can diagnose and resolve a wide range of hardware and software-related problems. To ensure personalized attention and a convenient visit, Apple provides the option to schedule a Genius Bar Reservation.

Contact Genius Bar.

Manage Reservations - My Reservations - Apple

Try enabling Greek autocorrect on an older iPhone running the same iOS version (ideally iOS 18.x). If it works on the older device but not on your 16 Pro Max, this confirms a device-specific issue.

Sometimes third-party apps won’t support certain language features, but Greek autocorrect should work in Mail, Messages, or Notes. If it fails even there, it’s a system-level issue.

Since you've ruled out settings, this is the most productive next step:

• Visit Apple’s Feedback page
• Submit under iOS > Keyboard/Input
• Include your device model, iOS version (Settings > General > About), and list the steps you’ve already taken.

Oddly it seems to work on my iPad. It suggests δείτε and afterwards some more options, as shown below. (But not on my iPhone.)