Where are you getting that? That question wasn't put to SCOTUS.
Trump was charged. Trump claimed he had "absolute immunity", and didn't have to face charges. Court rules against him in this issue; he appealed. Appellate court ruled against him, sending the case back to the trial court. He appealed to SCOTUS. SCOTUS said he doesn't have absolute immunity, and that the limit of his immunity is on his "official acts". SCOTUS then sent the case back to the trial court. The trial court will have to determine whether his actions were "official" or "unofficial".