The Samsung Galaxy S20 Ultra is undoubtedly an impressive piece of hardware. It costs a massive US$1400 and most would expect it to be perfect at that price point. Sadly, it isn't, as it still suffers from acute autofocus issues, and what appears to be a display defect only compounds issues.
https://www.notebookcheck.net/Some-Samsung-Galaxy-S20-Ultra-units-may-be-experiencing-a-green-tint-display-defect.461622.0.html