Youtube and Twitter notification in the settings of the Huawei P30 lite new edition not there, why?

Hi, I don't get any messages on YouTube or Twitter in the top push bar, but on WhatsApp and Snapchat. Twitter and Youtube are not included in the settings of the mobile phone. Who knows why it is not there and how I can finally get the notifications in the push bar again. It can't be because of the Huawei because I had a Huawei P10 lite before and got one. I hope you can help me.

I managed Twitter, but unfortunately Youtube is not there

If there's no corresponding option in the Android settings, then maybe in the settings of the two apps?

I found Twitter, but Youtube still isn't