Green screen tint issue

Hi, to isolate if it's a software issue, try the following:

Make sure to download the latest iOS update on your phone, go to Settings > General > Software Update.

Backup your phone - How to back up your iPhone, iPad, and iPod touch

Restore your phone as new - Restore your iPhone, iPad, or iPod to factory settings

Setup your phone - Set up your iPhone, iPad, or iPod touch

After setting up your phone, check your phone if it's still showing pixelated. If the issue persists then bring your phone to the nearest Apple Store or Apple Authorized Service Provider to get it checked. Book an appointment on getsupport.apple.com or use the Apple Support app.

Since it's a software issue, it woul be best to backup & restore your phone as new then set it up.

If the issue is still there then Apple has not addressed the issue yet & we just need to wait for the next update that may fix it.