Notifications

I want to receive all notifications on my watch 7, just like it is on my phone, but they dont always come through, i want to be notified also when somebody rings me through whatsapp or any other app. But it doesn't show. I have a Garmin venu and it gives me all these notifications. Why cant apple? I have no pin lock on my apple watch as messages dont come through with it on, I even set it to be unlocked while on my wrist but that dont either and even with pin lock off not all my notification come through. Any ideas please.