i think this group that reconstituted the Sanhedrin believes that the Temple should be rebuilt in our day and that a Sanhedrin would be necessary to authenticate the coming of the Messiah - i don’t know if they are part of this, but there is a group called the Temple Institute which has a wonderful museum/exhibit in the Jewish Quarter of Jerusalem. they have recreated the utensils and vestments from 2nd Temple to be ready for the rebuilding of the Temple in the present day. a fascinating place to visit and see those things we read about in Hebrew Scripture and now can visualize what it all looks like.
Thank you. That is the information I was looking for.