Please notice Romans 13 is about government in general. I.e. Caesar (note that Nero was on the throne at that time).
Nice try, no cigar, unless there is some serious bid at forming a Christiania where Caesar is the church (and notice history is not kind to that).
Romans thirteen is about legitimate government, as instituted by God. Nero was a tyrant who acted illegitimately. So you’re simply mistaken.