I have managed multiple relationships with Apple business and the only thing I can think you could possibly be talking about is having a local store reserve devices for you to buy.

As far as identifying a bug in the software and getting it fixed, or requesting a feature, you run into a brick wall. Taking that feedback from customers is not the Apple way. This is why there is a market for third party MDM companies in the first place.

Relative to what? The top comment in this thread is a 3-person chain explaining how their B2B accounts were locked with no communication or recourse.