As a developer, during debugging, Homey on my phone couldn't find my new brand

After running the homey app, Homey on my phone couldn’t find my new brand.

not find my app.

however,‘’“, This tutorial reveals that,

Did it work on the WebApp? Only not here?

Pls share your code repo.

This works with no problem for 100s of developers so I guess it is something in your code.