There have also been other reports sighted on Reddit and the Apple Support Communities. According to these reports, users are claiming that during the course of update to Big Sur, their laptops suddenly display a black screen and appears to be stuck that way. Users have tried resetting their laptops in a variety of ways, but apparently they are unable to and have not been able to bypass the black screen.
It is unclear if all MacBook Pros are affected by this, but so far a lot of the reports come from users who own the 2013 and mid-2014 13-inch MacBook Pro models, but this isn’t to say that newer models or the larger 15-inch or 16-inch models aren’t affected as well, just perhaps on a smaller scale.
One user claims that when they contacted Apple, they told them that they had to schedule a repair appointment and to bring in their laptop to get it fixed, which means that for now, if you’re affected by this, you have no choice but to send it back to Apple to get it fixed. If you haven’t updated yet, then maybe you might want to hold off until a potential fix has been released.