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 confirm: the option was not in the menu and I had to close the "Project explorer" view and re-open it to get the "Target" menu back. Thanks for the tip!