Screen flickering/flashing/blinking when using intel integrated GPU

First of all, thank you for your interest and reply. However, the problem continues even though I tried the solutions you suggested. In the meantime, there were those who experienced similar problems in this forum in previous years and in the recent past. I realized that I do not have a screen flickering problem when using a different browser such as microsoft edge. I think this problem is experienced in Safari and Chrome due to a different factor that I do not know, such as java or subtitles in certain sites or what is in YouTube. I had never had such a problem before the Big Sur update. But forums and tech sites have long been full of problems from those who have had similar problems with updates. It is a pity that such an annoying problem for a long time could not be solved by such a large company.