Email logs are files that provide information about email delivery and activity in your Salesforce org. Email logs contain details such as sender, recipient, subject, date, status, error code, and more for each email sent or received within a specified time range. You can use email logs to investigate issues with email delivery or performance in your org. In this case, you can use email logs to check if the status update emails were sent successfully or if there were any errors or failures. References:
https://help.salesforce.com/s/articleView?id=sf.email_logs.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.email_logs_format.htm&type=5