Solved
Nucleo H743ZI2 - PC8 not connected to CN12? The User Manual for the Nucleo H7 devices says that PC8 is connected to Connector 8 Pin 2 and Connector 12 Pin 2 (pages 39 and 42). However on my boards it doesn't seem to be connected to Connector 12 Pin 2
Unfortunately I have already designed my PCB and am now hoping that I just forgot to set a jumper or whatever, but I could not find anything about it in the User Manual. Maybe someone can measure on his or her board to see whether I am mistaken.