Documentation coverage is not the same as answer access
A company can have complete documentation and still receive the same questions from customers. The problem is often not missing information. It is the path between a customer’s question and the answer they need.
Customers may struggle to find the right source, use different words from the documentation, face too much effort to reach the answer, or find an answer that does not clearly apply to their situation. In some cases, they may find the answer but still not trust it enough to act.
The useful question is therefore not only “Do we document this?” It is “Can the customer find, understand, trust, and use the answer when they need it?”