Look into supporting apns-push-type setting

[TysonAndre]

This seems optional but recommended for iPhones/iPads, but not watchOS

apns-push-type	(Required for watchOS 6 and later; recommended for macOS, iOS, tvOS, and iPadOS) The value of this header must accurately reflect the contents of your notification’s payload. If there is a mismatch, or if the header is missing on required systems, APNs may return an error, delay the delivery of the notification, or drop it altogether.

[zanderisrael]

👍🏻