I understand Facebook Groups for iOS uses it, but how mature is the current component library (compared to Ionic for example)? If it's still small do you plan

I understand Facebook Groups for iOS uses it, but how mature is the current component library (compared to Ionic for example)? If it's still small do you plan on the majority of future components to be first-party or third-party (community)? Extremely exciting either way, wish there was a livestream of tomorrow.