Intel MBP 16'' 2019 i7 AMD 5300M Big Sur 11.2.3 LED Cinema display not recognized
I stumbled upon the following issue. I post just the relevant messages, despite their length and just in order to keep people informed about this issue and its solution or, rather, workaround.
In short: Watch out for "correct" switch on sequence (240V/MBP/EFI boot selection)! Details below.
MacBook Pro 16″, macOS 11.2