Deactivate Huawei dark mode does not work?

An hour ago, a kind of dark mode suddenly activated on my Huawei P20 lite. Since then the screen is dark when starting WhatsApp, Instagram (see picture)

The Google News is also dark.

But for me there's no setting to deactivate this dark mode?

So on instagram you can look for yourself there are light and dark mode in the settings but otherwise no idea why it is with you

just see if you can turn it off within your apps

In the Android settings you have the search function (the magnifying glass) at the top right. Just search for "dark" or "dark". If a darkmode setting exists, it should now appear there.

Also none

With Whatsapp in the settings under Chats there are the options Design. The set to light should deactivate the dark mode on whatsapp.