A Package is two or more different Services combined into one Service Menu item.
Online booking assigns one Client, one Service, and one Service Provider per appointment.
Because of this restriction, Packages are not available for online booking, nor do they display on your public Services page.
Packages can only be booked and checked out on the Schedule by the Business.
As an alternative and if applicable, create the Package as a Service instead. Title, price, and describe appropriately. It will be available for online booking if it's in that state, and when booked online, you'll know which Services are included based on the title.
Here's an example of what that Service could look like: