I'm having the same problem since I updated to iOS 14 on my iPhone X.
in particular, all the apps, no one excluded are not receiving push notifications of any sort.
in my settings the notifications are enabled for all the apps and background refresh too.
on Whatsapp for instance, if someone either sends me a text message or call me, I won't get any notifications!!! this is crazy.
I re-installed the app too, didn't help. did all the tricks that you guys suggested about changing the notification style from Temporary to Permanent, didn't help.
APPLE! please fix this!!!!!!!!!!! ffs. this is unacceptable from a company like yours.
I'm running iOS 14.2 at the moment and the issue still persist.
I work with the phone and notifications are like the ABC of a phone. get your **** together and fix this!