Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
It can be related to your ST-Link V2-1 Firmware version, could you please identify the version embedded on your nucleo ?
(you can read it form ST-Link Utility log or from openocd console ...)