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 ): but the picure is indcating that the code is running OK , if you want to stop it click on the puse button
and then it will activate the step into and step over buttons