If they are using UIKit, they aren’t using Flutter for cross platform development. They aren’t eating their own dog food. > Google concluded that it was time

If they are using UIKit, they aren’t using Flutter for cross platform development. They aren’t eating their own dog food. > Google concluded that it was time for the latter route, and that Apple’s UIKit had matured enough for internal needs. The company no longer had to maintain most of the custom components that it built out over the years, including app (top) bars, lists, and menus.