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
Have you tried using the STLink Utility and see if it’s actually OpenOCD or if it’s your board? If it works under STLink Utility then theres something wrong with your SW4STM32 installation.