Create the framework and add your controls
Start a custom framework and add controls to it one at a time. Each control gets a descriptive name, a unique identifier (a structured one like 5.1 or AC-12 keeps your reports clean) and, where it matters, a short description of what it asks for.
Mark the controls that are mandatory for this framework. That single flag is what turns an open gap from something easy to overlook into something devguard surfaces for you.