My S10 is strangely, and inconsistently, not displaying notification icons in the status bar. I will see new email notifications, for instance, on the lock screen, but when I unlock my phone the notifications do not display. If I relock my phone I can again view them on the lock screen.
All apps displaying notifications on the lock screen but not the status bar have full notification access in their settings.
I'm having the same issue on my S10e (Android 10, One UI 2.1). I rebooted and made sure that "Show notification icons" was enabled in the status bar settings, but the issue persists and I don't know what else to try besides a factory reset (which I would like to avoid).