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.
Have look at "Forums » System Workbench for STM32» importing a CubeMX project". The problem is raised by the indexer. Exclude unused header files from the index solved all my problems!