Question
LD1 (LED1) is not defined for device NUCLEO-H743ZI board STMCubeIDE version 1.0.2 STM32CubeH7 MCU Package 1.5.0
LD1 is not defined in device NUCLEO-H743ZI
LD2 and LD3 both seems ok.
also, the builtin flash tool doesn't have the latest firmware for the stlink v2
had to flash with the tool found here to get debug working: