After spending a lot of time, what worked for me was enabling and onboarding Siri for iOS. Then downloading models using Settings -> Translate -> (set on-device mode to true), then download models for the specific locale. Then run the app and waiting for some time for the models to download. (It doesn't work immediately).
Then the "supportsOnDeviceRecognition" comes to true immediately when creating the SFSpeechRecognizer() object. Hope this helps someone.
arunky
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution