Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA4M1AB/WDT/WDTCSTPR#0x0
SLCSTP=0
WDT Count Stop Control Register
These bits are read as 0000000. The write value should be 0000000.
Sleep-Mode Count Stop Control
0 (0): Count stop is disabled.
1 (1): Count is stopped at a transition to sleep mode.
https://github.com/cmsis-svd/cmsis-svd-data