In Unity 6, how do I make a separate build for a Demo with build profiles?

Unity Engine
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1

I don’t exactly seem to understand how build profiles goes.
They seem to not do much and I just select “Scene List” then “Windows” in platforms to build.
But the build profiles don’t work?

This is Unity 6000.5

2

in what way dont they work?

3

Ok, this one works now.
But, for instance, the custom splash image doesn’t show eventhough it should.

4

Ok, sorry, the splash screen didn’t show because my VR was connected.
It seems to work now.