In that case you will have to aggregate to an array first instead of directly using the Text Aggregator there.
Use a router and two filters:
- check if the array length is zero
- check if the array length is greater than zero
If array length is greater than zero, Iterate and Text Aggregator, before sending the email.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Did you know, the concepts of about 70% of questions asked on this forum are already covered in the Make Academy. Investing some effort into it will save you lots of time and frustration using Make later!