The Oversight Board — the policy body Meta created to weigh its most impactful moderation rulings — has seen its role within Mark Zuckerberg's empire come into question due to shifting content policy priorities and dwindling investment. The Oversight Board has taken steps to formalize its long-contemplated desire to work with other companies, but Engadget has learned Meta has thus far declined to move forward with that process.  Over the last year, board members have become increasingly interested in artificial intelligence policy and how their experience shaping Meta's content rules could translate into advising companies in the generative AI space. That interest has intensified as some AI companies have privately signaled they would be open to working with the board, according to a source familiar with the organization who was not permitted to speak publicly.…