iOS DateTimeFormat { hour: "numeric", minute: "numeric" } does not use locale setting

[andreialecu]

Bug Description

      console.log(
        new Intl.DateTimeFormat('en-US', {
          hour: 'numeric',
          minute: 'numeric',
        }).format(new Date('2021-09-30T18:00:00.000Z')),
      );

The above prints 21:00 (incorrect because of locale) on iOS, but 9:00 PM (correct) on Android.

On iOS, using timeStyle: 'short' correctly prints 9:00 PM but on Android it prints 9/30/2021 as timeStyle is not implemented:

      console.log(
        new Intl.DateTimeFormat('en-US', {
          timeStyle: 'short'
        }).format(new Date('2021-09-30T18:00:00.000Z')),
      );

[andreialecu]

Related: #1172 (comment)

[neildhar]

Hey @andreialecu, thanks for reporting this. Could you also share which version of Hermes you are using, as well as the iOS/Android version you are testing on?

It would also be helpful to see what the output of resolvedOptions is to see what locale the implementation is actually using.