I have checked with doesappinventorrunonios, and seen that NFC for iOS is not currently supported.
But I wonder if there is an extension out there similar BluetoothLE that might support NFC on an experimental/alpha level implementation?
PS. I did check the above extensions library on mit-cml, but like the MicroBlocks extension is somewhere else, maybe an NFC extension could also be hidden somewhere else?
Extensions are not allowed on iOS.
I have made an app using the 2 mentioned extensions (BLE and MicroBlocks) and it runs on iOS (adhoc) as well as on Android. So Extensions for iOS is indeed possible!
They do work, but it's really a hack. We built the logic for those components directly into App Inventor for iOS. Importing the extension in App Inventor gives you access to the blocks, but the extension's Android code is ignored.
Will it be possible to provide support for extensions in iOS in the near future?
It will definitely be possible. There are many options.