Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAMV71J20/XDMAC/XDMAC_CHID[1]/CBC#0x0
Channel Block Control Register (chid = 0)
Channel x Block Length
https://github.com/cmsis-svd/cmsis-svd-data