https://wccftech.com/ios-13-5-5-code-confirms-that-apple-is-working-on-services-bundles/

As per evidence found in iOS 13.5.5 beta code, Apple is working on a services bundle that would include Apple Music, Apple TV+, and more, in a single payment plan.

References to "bundle offer" and "bundle subscription" have been found in iOS 13.5.5 beta, which did not exist in previous operating system releases. As found by 9to5Mac, these codes are related to services like Apple News+.