The OnePlus 7 Pro (their new flagship phone) has a hidden selfie camera that extends out when in selfie mode.

I'm like the author of the article and largely I don't need a selfie camera. It's useful to have in the rare cases where I need to video chat or need a digital mirror real quick.

I'm actually very disappointed that the newer OnePlus 7T went back to having a camera notch but I suppose that means that enough of their customers didn't like the feature.