Hello @swayz this sounds like a perfect use case for an Operational Database. That way you can reference ID outputs like your individual Monday items. Use a database app like Airtable and you can grab the output ids from your Monday.com step and put them in a field there. In the next automation you can then lookup those fields in Airtable and map them to the Harvest app or wherever you need it.
Take a look at this article to learn more about how Operational Databases work: https://www.xray.tech/post/build-operational-database-odb