firebase messaging with provisional: true does not work as expected

[uditrugman]

Hi,
I'm trying to initialize firebase messaging on iOS with provisional permissions set to true.
like this:
NotificationSettings settings = await messaging.requestPermission(
provisional: true,
);

the problem, is once I call "reqestPermission" (like above), the user immediately get a dialog to accept or deny the permission.
but,
according to the documentation, I'd expect that the user will not be presented with any dialog at first, and only the first notification that is sent to the user will include an option to keep or turn off notification.

am I missing something?
what is the correct way to initialize firebase messaging to use provisional mode on iOS?

Thanks