Maybe tempered glass is causing this issue. It's covering the sensor that controls the adaptive brightness. To check it remove the tempered glass and see if you face the same problem. If not solved then it may be an internal issue. Then you should visit your nearest Samsung service center.
Someone is deleting my comment. Service guys are trash and not well trained ,they don't even know how to check it properly. As an comparable example electrician plugging a bulb and saying the voltage is okay, not using multimeter to check it
Perhaps physical damage may have led to the sensor's malfunction? Try other Samsung service centers. Kahin toh achhe jaankaar service center wale honge jo thik kr paaye ye issue.
Check ki "extra dim" on naa ho settings mein yaa fir quick panel mein.
We request you kindly share the log file. Also, share the video clips and images for better understanding. This will help us to investigate further and resolve this issue.
To share the log file: Open Samsung Members Application > Support> Tap on send feedback> Choose Composer> Select error report> Select the appropriate issue category> Type your query and send.
Note: To ensure relevant log information is included in the error report, submit the report within 3 minutes of encountering the bug or error, and do not terminate (swipe away) the Samsung Members application until you are notified that the report has been sent. This can take up to 5 minutes.
