Have been using Ring and the app for two years but recently the notifications does not appear for the app. This is related both to motion detector and the ring doorbell.
I use a android Samsung S9+ and have not updated the android version.
I am not sure but I earlier tried to install the Ring rapid app and my guess is that I choose to use this app as for standard and the issue started after that. Now the rapid app is uninstalled and no notificaitons appear.
I have tried to reinstall the app but no success + read this thread Notifications not working on Android 10 but none of the apps is installed.