An external adviser can help a founder distinguish symptoms from the operating conditions behind them. The value comes from examining decisions and delivery in the real company.
Start with a concrete pattern: work waiting for approval, standards that need constant checking, or leaders unable to act across functions. Agree what evidence would show that the pattern is changing.
Look beyond the immediate symptom
More people or another tool may help, but first establish who has authority, what information they need and who owns the outcome.
Leave capability in the business
Work with the leadership team to make responsibilities and standards explicit. The intended result is a company that can carry more of its own decisions and delivery.