OnlySP: “Now that some time has passed since The Division 2’s release, the honeymoon faze should be winding down. My viewpoint on The Division 2 comes specifically from a single players perspective. This means that at no point in the game did I encounter another player, instead tackling story missions and world events independently from outside aid.”
Source: N4G PC Can The Division 2 Really Be Played as a Single Player Game?