Lol. It's your hardware. You put a low quality sensor there and asking us to do clear data. Cut the **bleep** and start using better hardware. No wonder S20 series is a flop.

Known issue for exynos processors. No fix.

It happens with all m series phones. Parts used in these phones are really low quality. I faced this issue with M30. I removed the tempered glass and reinstalled it again so that the top bezel and the glass edge are aligned. Then it started working.

There is a screen issue just before AOD comes. Reset didn't help. Phone is not working like Android 9

Higher mega pixel doesn't guarantee good pictures. Sensor and other hardware matters.