Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA6T1AD/SYSTEM/VBTICTLR#0x0
VCH0INEN=0, VCH2INEN=0, VCH1INEN=0
VBATT Input Control Register
RTCIC0 Input Enable
0 (0): Disabled
1 (1): Enabled
RTCIC1 Input Enable
RTCIC2 Input Enable
https://github.com/cmsis-svd/cmsis-svd-data