Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
Install host dependencies.
Import toolchain and SDK.
Create, configure, build and manage apps.
Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench
I am not sure the Stlink reset line is connected to the reset pin input of your F103C8T on these boards.
So, when debugging with SW4STM32, select the “software system reset” in reset config options in debugger tab of debug config window.