Hi @Mike LHCG1 ,

in notification change from triggered to fire event and then you will get option to select your event registry. Here you have disconnect you have triggered the event from flow but that event is not associated with any notification hence email is not getting triggered.

while creating event you have option to pass param 1 and 2, there you can add additional members dynamically while passing the email id but you have to make sure that in your notification you have ticked marked the param 1&2.

To check in details you can refer my blog here, you will get tested code here.

https://servicenowwithrunjay.com/email-notification/

Accept and like the solution if it helped.