R7FS5D37A3A01CFM wathdog is not working

hi everyone

why watchdog is not working in my board ?

i am using internal clock HOCO and PCLKB is 5Mhz

in development board TB-S5D3 code is working as expected so kit having mcu R7FS5D37A3A01CFP(100PIN)

and in my board R7FS5D37A3A01CFM

basic HL-Layer - stack API i am using open and refresh but watchdog is not working. is any issue related to this mcu?

me

Praful Vanker