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 think the project you've imported was not for System Workbench but for STM32CubeIDE (refer to the warning message). CubeIDE project are not compatible with System Workbench which is why no setting is displayed.