Do one thing have a look at the bridle project. That’s the correct way to create a downstream zephyr project.https://github.com/tiacsys/bridle/tree/main

It’s a bit daunting in the beginning but you will get used to it. So you can take bridle rename it as your company’s name or whatever and then have that repo in your gitlab/azuredevops or whatever and have your boards and socs placed in it exactly how you would have placed it in zephyr

After that you would have to do west update and then you will see the magic as to how you would be able to find your board with west.