Hey @WillHarwell, Scheduled Workflows are still in Private Beta and I do not have access to them to check in my own instance. I have reached out to two folks internally to see if this is a limitation to the beta or not. In the meantime, have you submitted a support ticket for this behavior? I tried to find a ticket and assuming you work at ess******* I did not find a ticket. I will follow up soon.

Hey Will, I confirmed with a Customer Success Engineer that the option is unavailable in their instance. Still trying to confirm the reason, could be unintended. 

Hey Will, I received confirmation that scheduled workflows do not have send approval actions. I would recommend creating a ticket with support so they can capture your use case and relay that to the product team.

In the short term, you could have a scheduled workflow add a unique tag and have a regular workflow event triggering on an updated ticket using that tag and send the approval email that way.