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.
Just find out that using Cube you can change the user configurations (aka FreeRTOSConfig.h), this seems not possible starting a project directly on the IDE.