iPhone mini 12 running 15.1 os does not make sound or vibrate when emails are received.
We see your iPhone 12 mini doesn't play any sort of notification alert when an email arrives.
We'd first recommend double checking your notifications. If you're using the default Mail app, you can do so under Settings > Notifications > Mail. Verify there is a sound selected for Sounds and "Allow Notifications" is enabled at the top.
See more details regarding your notifications here:
Thank you Derek: Setting are correct - and still now sound or vibration.
Does this problem persist if you toggle the Ring/Silent switch to Silent Mode off? If that does resolve it, confirm if your device is set to vibrate on silent under Settings > Sounds & Haptics.
If the issue persists, and it is specifically the Apple Mail app, confirm if the settings for New Mail, Sent Mail or other settings on the Settings > Sounds & Haptics page are set to your liking, as they can be set to not play audio there as well.
Derek - thanks again; however settings are correct!!
In that case, we'd recommend reaching out to Apple Support directly for additional assistance from here.
You can see contact options below: