iPhone notifications delayed and not appearing after upgrade

upgraded Form older iPhone and now my notifications are delayed, and some other problems with notifications.

general slow notifications, I’ve never had to wait for stuff like bank ID notification more than a single second, now it’s never faster than 10 seconds, most of the timeline it’s a lot faster to go to the home scream search for bank ID and open it manually. I’ve compared it to my old phone, side by side same wifi a few times, problem persists, tried reinstalling, going threw notification settings.

some apps like Snapchat will even turn the scream on like there is supposed to be a notification then dim the lock screen again, and for the most part the notifications won’t ever show up. I know it’s Snapchat because I’ve gotten used to it now and will open the app to see someone typing or a brand new message.

these are just examples btw, it’s a problem with all notifications