According to posts in the Apple support forums, some iPhone 13 users are reporting that their displays have suddenly turned pink and that their devices are crashing as well. Some users claim that they have had some luck returning their devices to Apple and getting a new one, while others say that Apple support ran diagnostics and found that there was nothing wrong.
However, according to a report from My Drivers, it turns out that Apple did address the problem in a post on Weibo over the weekend. According to the post, “We didn’t notice relevant problems in the hardware of the devices because this situation [pink screen] is caused when the system is locked.”
As to the reason why it was posted on Weibo, it is because most of the complaints seem to have come from China. That being said, as 9to5Mac noticed, the latest iOS 15.3 RC does not seem to mention anything about the pink screen so we have to wonder if a fix is part of iOS 15.3 or if it will come later.