@Gasmask134
It's quite hard to think of an Eurasian super-complex chiefdom adopting a state religion, without adopting the structures of region they conquered : while the main political center, in its strictest sense, might adopt a more or less exclusive religious policy (possibly more trough antagonism than mission, IMO), the subordinated centers and families usually didn't followed much or at all (especially in furthest ones, would it be direct or indirectly dominated).
Even when establishing imperial states (Yuan China, Timurid Persia, etc.),
yasak practices on religion (coming from a much earlier tradition of religious tolerence, as long it wasn't politically adverse) played strongly enough to generally delay a total identification of ruling dynasties on local religious practices if not exclusiveness, with a long held belief that most of religions were true eventually.
It's why khaganates as Khazars or Uyghurs generally didn't really enforced a religion, even when the main families and rulers converted : we could see a Golden Horde ruler converting to Christianity (it was generally more true of elite's women, tough) thanks to a really active Fransiscan presence in the region, but I don't think it would mean that the Horde would become a Christian state, especially if the ruler would try to impose it imploding his chiefdom in the process.