I think SCOTUS review is inevitable because loser has a right to appeal, and this case bypassed Distrcit Court.
You should read the opinion. SCOTUS will have to twist itself into more of a pretzel to uphold the OSHA ETS.
Although if SCOTUS does not listen to it, then Biden’s mandate will be struck down.
The full case will actually be tried by the district court anyway, so that appeal would be heard by the Circuit court. This decision is only interlocutory, not a final order anyway.