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 have a similar problem, when I set a custom or ST board this setting is only memorized ass long as AC6 is running. After shutting down and newly load the project, this setting is away 😢