Apple Mail does not fully sync on iOS
Since installing iOS 13 I have noticed that Apple Mail on iOS shows messages that I have read and deleted or moved to other folders on iCloud or macOS. I have two iOS devices and they show different messages in Apple Mail.
I have no desire to process every message multiple times, once on each device.
How do we fix this?
All my software is up to the latest version of iOS and macOS.
iPhone 6s