People of my generation and older remember the old E.F. Hutton commercials. As a kid, I had no idea that it was a brokerage firm, but I knew that when an E.F. Hutton talked, people listened. When it comes to the Department of Labor (DOL) talking about retirement plans, my recommendation is the same.
One concentration on the DOL these days on audits is asking plan sponsors about their written cybersecurity policies and procedure, and asking about cybersecurity attacks, and the response(s) to them. So my recommendation is pretty clear: get a cybersecurity policy.