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 have exactly the same problem! SWD is missing from the list. And this is in the newest, freshly instaled Workbench version, installed on a clean computer (by coincidence, I'm doing a full reinstall of one of my computers at the moment)