Does opting out a phone number for SMS trigger any event?

According to this documentation: you can query to find out what numbers have opted out via ListPhoneNumbersOptedOut API or you can check an individual number with the CheckIfPhoneNumberIsOptedOut API. I don't see an event documented. An approach to take would be to use a scheduled event in AWS Event Bridge that would process this list and invoke events for each number, or new number, if you keep a list elsewhere.