It seems that Constantin had reached certain agreements with Puding, or rather, behind Puding's rise to power in the Kremlin, Constantin had exerted significant effort!
Therefore, after Puding had consolidated his position, he could also provide great assistance to Constantin, issuing a special presidential decree that would permit the descendants of the Romanov family to retain their nobility titles.
Of course, it was just the preservation of the titles; there would be no special privileges or treatment...
Moreover, the particular mention of "The Great Pontiff" was due to the traditions of Tsarist Russia.
It was also an old European tradition, the divine right of kings.
When the Tsar was crowned, he would hold a scepter in his left hand and a globus cruciger in his right!
And The Great Pontiff, he was the Archbishop of the Russian Orthodox Church!