The board STEVAL-IDB007V1M with STM32L151 CBU6 CPU and BLE module may not be available in the STM32CubeMX list due to various reasons, such as the software package not being up to date with the latest board support. You may need to check for updates or consult the official documentation and support channels for the STM32CubeMX program to find compatibility information or possible workarounds.