Hello! I understand you're not receiving the app password reset email on your iPhone running iOS 18.6, even though your phone and email seem to be working fine. Let me ask a couple of quick questions to narrow this down:

1. Have you already checked your spam, junk, or any filtered folders in your email app to see if the reset email landed there?
2. Are you certain the email address you entered for the reset is the one registered with the app?
3. When you try the password reset, do you get any confirmation that the email was sent from the app interface?

Sometimes these emails can be blocked or filtered despite the inbox working perfectly. Also, some services require you to verify your email or enable two-factor authentication before they send reset emails.

If you haven't tried already, here’s a straightforward step-by-step approach:

1. Double-check spam/junk folders: Sometimes these automated emails get flagged as spam.
2. Search your email: Use keywords like the app’s name or “password reset” in your email search.
3. Confirm your email address in the app: Make sure you are submitting the exact email tied to your account—typos happen!
4. Resend the reset email: If possible, request the reset email one more time, waiting a few minutes between tries.
5. Check email filters or rules: On your iPhone Mail settings, or your email provider’s web interface, verify that no filters are diverting the email.
6. Test with a different email: If allowed, try initiating the reset with another email (if you have one registered).
7. Verify your account and security settings: Some services won't send reset emails unless your email is verified or two-factor authentication is configured.

If these steps don’t help, it’s possible that the app’s mail server is having issues delivering reset emails to certain domains or your address. In that case, contacting the app’s support directly might be necessary to check for backend issues or to help manually reset your password.

Would you like me to guide you through any of these steps in more detail? Also, if you want, I can check for any known issues specific to the app you’re using.