S10 edge lighting notification issue

reset the edge panel clear cache

try downloading notification edge from galaxy store

factory reset phone

will check this option in last.

have you enabled these settings

try uninstall and reinstall notification edge from store

check whatsapp setting under notification or enable whatssapp in notification on settings

everything is okey ..I checked

Always make a habit to clear the cache after every major update. This clearing of cache prevents and solves many problems. Did you clear the entire cache partition? If not clear it from the bootloader menu.