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Sadly, SE doesn't have anymore the list of all their paid employees, so I can't verify that there is someone dedicated to this. Yet the recent events on off platform venues and the response of SE as company seems to be that there isn't a real coordination on the public off platform face of the company.
SE seems to have a very large team of community managers, but these are usually dedicated to manage SE own community, but no one to manage the communities that interact with SE outside of SE. This seems to be an oversight. The current list of open positions focus on the engineering and product selling aspects of SE. But this aspect of the business, the one that has to deal with off platform interactions, seems to be fallen into whoever employee happens to see and be able to respond to those.
Sometimes you have to deal with clients that don't really use the site as more engaged individuals nor pay for its use. Lets be serious and get someone to be a measured and corporate face to people that isn't the core clients.
This person should have close relationships with SE CM's. corporate, devs and sales/marketing. Remember this would be a person to represent the company to those outside of it, and having uncoordinated messages at all these levels was the thing this person is set to solve