Hi Connor, I came up against the same limitation for a similar problem so I used a Post Function with the JIRA add-on ScriptRunner to perform an API call that creates a pulse when a particular state change occurs (see details - Using the API to create a pulse with JIRA ticket details from a JIRA state change - #4 by AlexSavchuk)
I know this means you’d have to do a state change to get them in so if that’s not appropriate then there’s a script testing console that you could use to get the items you want (using JQL) then call create_item for each result them. I’ve seen looping examples in Groovy script whilst searching but not done that myself yet.
btw - ScriptRunner has a free trial but then is $5/month
hope that helps
Simon