IMDbPro has added Kevin Kavanaugh to the Film and Crew list for John Wick: Chapter 3. Kavanaugh was also the production designer for John Wick: Chapter 2 and his IMDbPro page is also showing the JW3 credit. The screen capture is below. Anyone can add info to IMDb. To add info on IMDbPro, you need to have a subscription so the info is usually added by someone associated with the production. That being said, the info is still suspect until verified by an industry trade paper that includes their source.
Note: I don’t waste my time quoting articles that either can’t be bothered to source their information or source another site who failed to provide a source for the info.