Huawei Mate 20 Pro settings?

How can I unsubscribe from Huawei Mate 20 Pro youtube, when I click on it, it jumps to settings and can't continue from there.

I would simply delete data and cache from the app.

Youtube is an integral part of the Huawei Mate 20. Go and clear the cache, and delete the data, then you simply disable the app… Then it is probably still on the smartphone but there are no more updates and is completely inactive to them maybe later again want to activate.