Where can I find Sent Email Logs

So we recently got updated to Appian 20.4. I was doing some smoke testing and found out that emails are not being send out from the env. I wanted to find out where I can find the logs for this issue?
Email Node Details: 

From: Custom Sender,Â%A0

Display Name: ***_Notifications
Sender EMail: ****_Notifications@****.appiancloud.com

To: toemailaddress("xxx@xxx.com")

Note: We are on Cloud. I wanted to do some preliminary checks before I raise a ticket with Appian.