Stanford did beat Syracuse and Mississippi State on a neutral court. but yes, their only true road game thus far has been at San Francisco.
This has been an unusual Stanford OOC schedule in that regard, as they almost always play tough true road games earlier in the season as part of home-and-away series. It just so happens that their games against both Tennessee and Gonzaga were at home this year. Last year, of course, both those games were on the road. And two years ago, they opened the season at Ohio State (where they got blown out) and on Dec. 3 got destroyed at Baylor. That 2017-18 Stanford team looked a hot mess early on.