TTL & priority

Have anyone found how TTL and priority works? Cannot see it makes any different on my phone.

Both are explained here

Thanks

Then I misunderstood the usage of this. I thought it would work similar as on ios.

" iOS gives special priority to this type of notification. Critical alerts always appear at the top of your lock screen above all other notifications, and play a sound even if Do Not Disturb is enabled or the iPhone is muted. Because we never want you to miss a critical notification, they are allowed to bypass the app notification rate limits as well."

Nope. Critical alerts will eventually get implemented on Android, but not yet!