After getting the Android 10 update, users of Nokia 2.2 were not able to receive notifications from the apps. The only way to see the notifications was to open the app and then see what you missed in the past time. Users were asking for the fix and Juho Sarvikas responded on Twitter that Nokia Mobile found the issue and is working on it. The fix should be available soon for Nokia 2.2., but the exact date is not yet known.
Anyway, if you are experiencing problems with your Nokia 2.2 on Android 10, bear with is a bit longer till the promised fix arrives. At least you have an Android 10 running smartphone :).