Apple sent a mail that

We’re reaching out to let you know that the subscriptionPricePoints endpoint now requires a territory relationship filter. If you use the App Store Connect API to configure your subscriptions, please note that you'll be required to define this filter in an upcoming release.

I wonder whether it was already implemented and already have been using territory filter or if it is not implemented, have you got any plan to implement? We’re specifically interested in the Flutter SDK.

Thanks in advance for your time.