In what way?
As in the monarch is the head of the religion, up to and including the monarch being considered a living god*? Or as in the religion is intimately bound to a nation state, whereby something terrible up to the end of the world will happen if the state disappears?
*Of which there have been many - Imperial Rome, Ancient Egypt and Japan being amongst the most famous.
Like in OTL? or any form of Caesaropapismwith any pod have a religion based on temporal authority
Not exactly as the religion had non political roots and goals. a political religion like juche but a fundamentally enciriclingLike in OTL? or any form of Caesaropapism
Church of England (1534)
Shinto under Japanese Emperor (Meiji restoration)
Any post reform German or Scandinavian state
Russia Orthodox Church (Most Holy Synod 1721-1917)