Huawei p20 lite - Do not disturb mode with favorite contacts, WhatsApp messages stay silent anyway?

I have been the Huawei p20 lite for a few days now. However, there's a problem. Namely, if I turn my phone on please do not disturb turn on and set it on preferred contacts. I receive only calls and SMS with volume from the favorite person. But not on WhatsApp.
Is it possible to set it so that you get the news of the person on Whatsapp? If yes how?

Unfortunately I still have the P9 but probably nothing has changed in the mode.

Unfortunately, it is not possible because wireless calls and SMS are from the operating system and What's App is just a random app like any other game and messanger and thus can't be set for individual contacts.

Not so easy to explain but it is either completely or not at all.

Okay, thank you.