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.
i am not sure if this is the reason but latest cube does not work for me, i found the bug in rcc init and clock does not work ok. check what is your system clock if thi is ok