Yes, but because of the somewhat counter-intuitive way court decisions work, we only have to win one case at the district court level to get a national injunction. Doesn't matter how many you lose because the result of those "losses" is just a dismissal of that particular case. There isn't any "order" saying that it must be upheld throughout the nation. And we've won.
I know how much he is hated, but the truth is that we're winning in these courts largely because The Turtle tossed the judicial filibuster, and rammed through huge numbers of Trump nominees. And, despite the predictions McConnell would fold, also kept Garland off the Supreme Court.
Credit to the Turtle where it is due on judges.
There was a contractor vax decision last week, Kentucky v. Biden, where the geographic scope of the order was limited to a few states.
So, sometimes one win is enough to cover the US, sometimes it is not.