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.
If you work with STM32CubeMX you have to check the BOX "Generate peripheral init as a pair ...".
An ohter issue that i had was, to plug my STM32... over an USB HUB.