Announce Calls feature
I have my iPhone 12 Pro Max setup to always announce calls, but it NEVER does. Anyone else having a similar issue?
I am not aware of what sort of settings you have nor you have mentioned it.
Tip: You can have iPhone announce all incoming calls or only calls you receive while you're using headphones or Bluetooth in your car. Go to Settings > Phone > Announce Calls.
Answer or decline incoming calls on iPhone - Apple Support