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.
Yes, SW4STM32 supports STM32F446 mcus and STM32446E-EVAL board. Are you using this board ? It looks like there is an issue with power supply. Did you change the default position of the jumpers ?