Yeah this is weird. Maybe they meant "React Native-like reusable components". Flutter widgets take inspiration from React Native:

"Flutter widgets are built using a modern reactive-style framework which takes inspiration from React Native. " - https://flutter.io/flutter-for-react-native/#built-in-widget...

Indeed. It's inspired by react (diffing algorithm to determine what to render) but I saw nothing to indicate it can use react components inside flutter.