Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAMD51G18A/MCLK/APBDMASK#0x0
APBD Mask
SERCOM4 APB Clock Enable
SERCOM5 APB Clock Enable
ADC0 APB Clock Enable
ADC1 APB Clock Enable
DAC APB Clock Enable
PCC APB Clock Enable
https://github.com/cmsis-svd/cmsis-svd-data