In OTL, the death of King Girvan Yuddha Bir Bikram Shah, a close associate of Bhimsen Thapa led the once great reformist Prime Minister of Nepal into a downward spiral due to depression and loss of power, however ITTL, King Girvan manages to survive, and the reformist laws he wished to make in Nepal goes through, involving a huge butterfly effect across the world.

(A more realistic remake of my old timeline)