https://www.techradar.com/news/samsung-galaxy-s11-probably-wont-have-an-under-display-camera

Recently both Xiaomi and Oppo have teased phone screens that have the front-facing camera hidden inside them, so there’s no punch-hole, notch or any other visible break in the display. However, it could be quite a long time until Samsung uses this technology.

At least, that’s the impression @UniverseIce gives in a tweet, saying that the technology will take a long time to mature. They add however that punch-hole cameras should get smaller in the meantime.