Thanks for the link. I noticed some of these OEMs had started implementing their own "more reliable" PushKits, but I am guessing that the privacy implications are quite bad so it's basically a non-starter.
Yes. Also, for example, Huawei is not permitted to use Google Services on their new devices. As a result, they leverage a replacement called HMS and they replaced FCM with the HMS "Push Kit".
Privacy or not, it's the only way to send notifications to new Huawei devices that don't have FCM like the Huawei P40 that are sold worldwide. This isn't a niche issue -- Huawei was recently the #1 manufacturer of smartphones outside of China, surpassing both Apple and Samsung. Although this ranking has fallen as consumers have become aware of the lack of Google Services on these devices.
Privacy or not, it's the only way to send notifications to new Huawei devices that don't have FCM like the Huawei P40 that are sold worldwide. This isn't a niche issue -- Huawei was recently the #1 manufacturer of smartphones outside of China, surpassing both Apple and Samsung. Although this ranking has fallen as consumers have become aware of the lack of Google Services on these devices.