No notification for WhatsApp.

Hi AuroN_PL,

It's expected that you won't see WhatsApp in your notification settings, as this app isn't compatible with macOS. The only Apple product WhatsApp is compatible with is the iPhone, as noted here: WhatsApp Messenger.

Regards.

Hello AuroN_PL,

Thank you for reaching out to Apple Support Communities.

This article may be able to help: How to manage your notifications

Let's also verify your notifications are enabled for this app:

"Change Notifications settings on Mac

On your Mac, use Notifications settings to specify when you don’t want to be disturbed by notifications, and to control how notifications are shown in Notification Center.

1. To change these settings, choose Apple menu  > System Settings, then click Notifications   in the sidebar. (You may need to scroll down.)"

As outlined here: Change Notifications settings on Mac

If the issue persists, can you provide a few more details? When did you first notice this?

Has notifications ever worked for this app previously? Also, are you receiving notifications for other apps?

Cheers!