I got a success message after restoring my subscription through the iOS app, but I still don’t see “Premium” next to “Your Plan” on the Settings screen.
Updated
If you did not get any error messages during the subscription restore process, then fully close the app and restart it.
If you still do not see “Premium” after restarting the app, log out of your account and back in.
If you are still unable to restore your subscription, fill out the contact form for Funimation Support.