i’ve posted a method to get past the black screen event, several times on this forum thread. I had this happen four or five times, in the months after I bought my 14pro. The method, using Siri, fixes the problem, instantly, every time. I upgraded to the latest firmware and switched to using the Mag Safe charger, the problem hasn’t happened in quite some time. When this was happening, to my phone, I was using a wireless charger - a platform thing that you lay the phone on, to charge, but not Mag Safe - the Apple brand magnetic disc charger. Don’t know if it was the firmware update or the Mag Safe charger that fixed the problem. What charging method do you use? If it happens again, ask SIRI, to turn up the brightness, for you, and see what happens.