Do you mean better documentation for setting up the entitlement server? The only documentation I'm aware of is the first link below step one: Direct Entitlement API v2. It's the same document used for DPS entitlement.
Which step-by-step documentation for DPS are you referring to? AEM Mobile and DPS still use the same entitlement system, and you need to go through the same steps to set it up. A fairly recent change is that you no longer need to send an email message to Adobe to request an Integrator ID and provide your entitlement server settings. Instead, you specify your entitlement settings as described in the "Set up entitlement" article.
Feel free to contact Adobe Support for details about entitlement configuration. The information appears in the Support tab when you sign in to the Portal using a Master Admin account.