How do I let Hosts choose to "Auto-Confirm" or "Manually Confirm" their Reservations?

You can allow your Hosts to choose how their reservations/bookings are confirmed by adding the attribute  Transactable - Confirm Reservations to both Space_Wizard and Transactable Attributes forms. This will allow the Host to choose whether to manually confirm all reservation requests or have them all automatically confirmed.

The Host will see this attribute within their Listing forms: