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 push Debug button on System Workbench and System Workbench programs QSPI-Flash and start the program. System Workbench seems to be able to program QSPI-Flash of STM32F746G-Discovery.