Notification issue after the phone is in deep sleep (not using it when im sleeping till the next morning)

It happens on my iPhone 13 mini but not on the 7 Plus I have. I'm using IOS 15.1, not recieving notifations on Whatsapp, Facebook, Twitter, Instagram, Emails the next morning. I would need to open the apps to check the notifications, after restarting it seems to be fine for the rest of the day until the phone is in sleep until the next morning then it happens again. I've checked notification settings, it is all good. I've checked do not disturb and focus mode it is off as well. I even reset the phone settings as well. But still the issue is persisting. Tried to get support but they aren't that helpful as well. So does anyone have the same issue as me. If yes, is there a fix/solution to this? Thank you in advance.