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Yes, and there is an option to opt-out of that list. I did enable that.

I'll phrase my issue differently: Is there any way to have reliable notification delivery that are time critical? Is actually calling the only 100% reliable option, as the PagerDuty does?

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Push notifications via play services are the only reliable way. They work even with battery saver on (but not extreme battery saver, unless the app is excluded).

Note that you can only have one push notification reliably per user interaction. So once you have sent a notification, further ones won't be reliably delivered until the user interacts with your app in some way.

That's perfect, thank you!

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