Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAMV71J20/EFC/EEFC_FMR#0x0
EEFC Flash Mode Register
Flash Ready Interrupt Enable
Flash Wait State
Sequential Code Optimization Disable
Code Loop Optimization Enable
https://github.com/cmsis-svd/cmsis-svd-data