A lot of details are written in the feature request: https://github.com/flutter/flutter/issues/114692.

tl;dr: Options B & C from the add2app iOS guide have a limitation (build error) in case the Flutter plugin and native iOS app have a shared dependency. We can use a workaround to avoid the issue, but in this case we don't need to build frameworks for plugins.

Closes https://github.com/flutter/flutter/issues/114692
Part of https://github.com/flutter/flutter/issues/130220