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.
On many ST eval or nucleo board
put a break point in main , press go tolet mcu run
reset the cpu via the push button .. voila your back to the breakpoint after reset