I have a question about Mail deletions syncing with iPad and iPhone

Common Troubleshooting Steps (If you are using IMAP)

If you are certain you are using IMAP, try these steps in order:

1. Restart Both Devices: A simple restart of your iPhone and iPad can often clear minor glitches that affect syncing.
2. Toggle Mail Sync Off and On:

• • Go to Settings on both your iPhone and iPad.
  • Tap Mail > Accounts.
  • Select the account that isn't syncing.
  • Toggle the Mail switch Off.
  • Wait about 30 seconds, then toggle the Mail switch On again.

Check Fetch Settings:

• Go to Settings > Mail > Accounts > Fetch New Data.

Make sure your setting is set to Push (if supported by your mail provider) or a short Fetch interval (like 15 or 30 minutes), not "Manually."

Remove and Re-add the Email Account:

• Go to Settings > Mail > Accounts.
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• 
  
• Select the problem account.
• Tap Delete Account.
• Restart your device (optional but recommended).

Go back to Settings > Mail > Accounts > Add Account and set up the email account again. This re-establishes a fresh connection with the server.

Check for VPN or Private Relay Interference

Sometimes a VPN or Apple's iCloud Private Relay can interfere with the Mail app's server connection and syncing.

• Try temporarily disabling your VPN or iCloud Private Relay (Settings > Your Name > iCloud > Private Relay) on both devices to see if the syncing returns to normal.

Glad to hear it's working.