Amazon Fire HD8 push notifications not working

Hi all,



Just bought a new amazon fire HD 8. It runs Fire OS 6.3.0.1, a variant of Android. Been working well, except push app notifications don't seem to be working.



I loaded a couple apps but none of them are showing push notifications when they should be (I tested on other Android devices and the apps all show push notifications for events that I set, but the fire tablet doesn't). This happened with several apps, leading me to think it's an issue with the fire tablet, not the app.



Went through settings and the apps all have notification access allowed. Do not disturb is not activated. Battery saver settings are off too, so there shouldn't be any restrictions in there. Software is all up to date.



Wonder if anyone has any suggestions on why these push notifications aren't working?



Thanks in advance