Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H7x7_CM4/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
https://github.com/cmsis-svd/cmsis-svd-data