I asked because that’s what I assumed you meant by “send the search results as a parameter” (return data from custom event). Parameters can’t be dynamic expressions, how would I use a search that’s only supposed to take place on the backend as a parameter?

No, this is desired behavior. My point was, let’s say I have an Action 1 that Makes changes to a thing based on a search result. Action 2 sends an Email based on that same search result. Would “Result of step 1 (Action 1) is empty” work for Action 2’s condition? That way I wouldn’t have to repeat the search twice.