I've been experiencing an issue with push notifications from Gmail since my android 10 update on my Samsung Galaxy M30. Either the notifications are missed or mails from subscribed newsletters via Gmail appear inconsistently.
So far, there have been no issues from Gmail notifications until my device updated to the latest Android 10 version.
I'm not sure if the root cause is due to any bugs in the software version running at present. It's becoming a serious issue of concern⚠️