Hey I got the solution that work for me which is different from al others :- step one :- press the power button , after pressing the power button , Hold "command + R" button . step two :- you will see macOS utilities > Click on Restore from time machine backups . step three :- after clicking time machine , I find out that I have no backups in my backup , So, what I did is just open time machine with two or three hours , without restating . step four :- If you complete three or four hours , then just click to restart . And after that everything work fine . I don't know what make it work , but to be very precise I have a flickering issue , and there are two times I faced same problem which I solved through the same solution , thankfully it work . let me know if this work for you not . Thank me later

How to resolve flickering issue in Mac air ... After update to the big sur the problem occurs ... Please help

I also have flickering issue on my Mac air ... please suggest how to resolve it ... After upgrading Big Sur ...

Flickering issue after update to Big Sur ... Please help ...