Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wb0/STM32WB06/TIM1/CNT#0x0
CNT register
CNT[15:0]: Counter value
UIFCPY: UIF Copy
This bit is a read-only copy of the UIF bit of the TIMx_ISR register. If the UIFREMAP bit in
TIMx_CR1 is reset, bit 31 is reserved and read as 0.
https://github.com/modm-io/cmsis-svd-stm32