Do you think that Fate/GO lostbelt is Plausible Alternate History(I has excluding Legend AH like Lostbelt 2,Lostbelt 4 )

Lostbelt 1 is Russia during Ivan the Terrible era but asteroid has crash in russia and turned world to Ice age but Russian People survived and Ivan the terribel reigh till 2019

Lostbelt 2 Is China during Qin Shi Huang that doesn't Died because Mercury Poison and Become Immortal because mercury and conquer the world