Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
Install host dependencies.
Import toolchain and SDK.
Create, configure, build and manage apps.
Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench
When i choose the STM32F407VETX as target MCU the MCU definition dialog and the linker script define this part as having 128 KB RAM but to my knowledge this part has 192 KB RAM (and some CCRAM)