I'm using the work email waterfall, and since it's a waterfall, all th...

I'm using the work email waterfall, and since it's a waterfall, all the find email steps after the first find email have a conditional run formula associated with the previous step(s). My question is how do I add to this formula so that the waterfall still works and I get an additional run condition evaluated successfully? I have a previously calculated formula field that should say YES in order for the email waterfall to run. I can add the condition via the AI "generate formula" option in the first email finder in the waterfall (since I'm no good with writing the formula from scratch) since there's no formula in there....but for the other find email steps, I don't know how to string together the existing waterfall run logic and my additional condition. Does my question make sense? 😂