At a minimum, the Work OS Health Check is scheduled to run at the end of each week and includes an inbox-cleanup assessment. It identifies the email that is ready for cleanup; Inbox Cleanup is the action that moves eligible no-action email out of the inbox.
If your inbox changes throughout the day, consider scheduling Inbox Cleanup separately at the end or beginning of the day. That keeps the automatic no-action cleanup moving between weekly health checks. A scheduled run skips the interactive review; email that still needs your decision remains in the inbox for you to handle later.