Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H742x/RCC/AHB3RSTR#0x0
RCC AHB3 Reset Register
MDMA block reset
DMA2D block reset
JPGDEC block reset
FMC block reset
QUADSPI and QUADSPI delay block reset
SDMMC1 and SDMMC1 delay block reset
CPU reset
https://github.com/cmsis-svd/cmsis-svd-data