Not anymore it doesn't. Sounds like just having a few people show up in black robes and telling SCOTUS they've been placed there is totally legal now as long as it's an official order.
It isn't subject to criminal prosecution but that doesn't mean it actually will do anything. SCOTUS didn't say they'd rubber stamp anything a president did, just that he can't be prosecuted. Those justices would have no authority and no lower courts or states would listen to them.