I’m trying to create and send a Mailchimp campaign. When creating a campaign in Mailchimp’s website, there’s an option to send the campaign, or to set a time to send:

On Zapier’s site, I see this field under the Test tab:

But it seems like there’s no way to set a value for that field in Setup or Configure?
I know that I can send a campaign as a separate step. I’m doing that now but it’s clunky and error prone so I’d like to find a way to create/send in one step.