STM32L462 USART3 not working for BootLoader

[AP_040]

I am working on STM32L462 MCU. I would like to know about the UART usage for the boot-loader communication with host. By using this MCU, I am able to work with the USART2 but same is not with USART3. Also, attached snapshot shows that for USART3 (PC10,PC11) pins used but that type of pins is not available in STM32L462 (PB10,PB11). So, please confirm whether USART3 is working with boot-loader or I have to choose from either USART1 or USART2?

[Tesla DeLorean]

If PC10/PC11 aren't bonded out to pins on your chosen device, then USART3 isn't going to be usable. The same die is used across multiple products/packages.