Wait for what?
- Extensions might never be available for AI2 ios or the extension you need might not be practical. Time will tell
- if extensions do become available be aware of MIT's comments Extensions for iOS regarding how their use will probably be limited.
- As things stand now, use of extensions for ios may be a year or so away.
Instead of waiting you might build your coding skills by moving to a professional compiler that probably can do what you would like NOW.
- You might start building apps using Android Studio and Swift for Android and ios
- You might use B4x which can make apps for both using the same basic code.
- You might use the Delphi Community Edition that can make apps for several platforms including ios and Android using the same code base.
- You might redesign your Project to work with standard components using native Blocks.
App Inventor 2 is a great tool but it will never be able to do all the things the professional compilers can do now.