Two suggestions, based on my experience:

1) Add a section called "Potential Changes". This is broader than "missing features", and can include other items too, such as new hardware that might become avaliable, customer requirement changes you might anticipate, possible new technology (e.g. a new database or cloud service that might be useful), multilingual support, etc. Listing some of these often causes reviewers to think of others as well.

Ensuring the design is modular around such changes means implementing any of them will be far easier than if assumptions are hard-coded throughout the codebase.

2) Security and privacy are two aspects of a more general category of "compliance assurance". Those two are worthy of their own categories, but you should have a section covering any other legal, regulatory, or corporate requirements. The plan for auditing these compliances should be listed too.

Often, of course, there are none beyond security and privacy.