No, that’s not what they said. Lindell had petitioned for the case against him to be dismissed. A lower court denied his petition, he appealed that ruling, the next court said that his petition was premature, and SCOTUS decided to not take up the appeal. So the case will go forward.
But this isn’t about Lindell’s petition. This is Dominion suing Lindell for defamation. The Supreme Court rejected the case.