Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA6T1AD/SPI0/SPCKD#0x0
SCKDL=000
SPI Clock Delay Register
RSPCK Delay Setting
0 (000): 1 RSPCK
1 (001): 2 RSPCK
2 (010): 3 RSPCK
3 (011): 4 RSPCK
4 (100): 5 RSPCK
5 (101): 6 RSPCK
6 (110): 7 RSPCK
7 (111): 8 RSPCK
https://github.com/cmsis-svd/cmsis-svd-data