my cat refuses his meal

my cat loves dry kibbles but we predominantly feed wet food for hydration purposes.

he still eats his kibbles given as an occasional snack but refuses his wet food during meal time. we have tried toppers, occasionally switching out brands carefully but he still prefers eating kibbles. my 2 others cats on the other hand is eating normally.

is this a cause for concern? how can i make him less picky about his food?