We published a Mailchimp Mobile SDK Swift package for use in Xcode. 

In Xcode 11 or newer, Swift Package Manager provides a native way to add package dependencies to Xcode. Compared to a third-party manager such as Cocoapods, Swift Package Manager is an even easier way to install the Mobile SDK. Making MailchimpSDK available as a Swift package allows us to reduce duplicate code and promote maintainability.