That's good that you are able to apps that you need on Galaxy Store, if incase you're unable to find any app that you need in Galaxy Store, you can try to find it in Play Store they might have it there.
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The messages are different, but this is the one that caused me to ask the question. You can see the insecure wifi notification, but I can't expand it. Tapping on it opens the Samsung members app, but the list of notifications and messages are up to date and I don't see any way to view old notifications/ messages.
It seems weird that I would need to install an app to view messages from another app.