There is a chain reaction, which started from India and now South Asians are pivotal in spreading cricket.
British India had Ind, Pak, BD, SL, Burma, Maldives all part of it (SL & Burma were separated later)
India had a team. Then Pakistan separated and they also had a good team.
SL also got independence. They had cricket. Seeing the 2 Big nations of South Asia play cricket, they wanted to Join them. Soon they also got Test Status
Meanwhile BD separated from Pakistan. The Cricket influence was always there. The 96 WC in Sub Continent brought high focus. Then cricket left all sports behind and they also joined the big boys
Afghanistan had a war. Many refugees came to Pakistan. There in camps they saw cricket crazy Pakistani's. Also there was always the effect of Indian Movies. Soon they learn't the game and fell in love with it
Nepal had many people working in India. You don't need a passport to work in India. Also came Cable TV and Indian channels. The game picked up and the sports in No 1 in Nepal
Bhutan is a small country. Secluded from the world but then came Cable TV, and Besides many Bhutanese coming to India and working. They picked up cricket. Now Cricket is the no 1 game played by students and has wide following
Maldives:- Many tourists visit Maldives. Also a strong influence of Ind & SL is the key behind cricket spreading there.
Iran:- The Baluchistan and Sistan province of Iran which borders Pakistan and has Baluch living who also live across the border in Pakistan really love the game. Rest of the Iran is still football crazy. But the game is spreading and over 10 years I expect that strong South Asian effect will spread the game there.
UAE, Kuwait, Oman, Bahrain, Qatar, Saudi Arabia:- All these nations have large populations from Sub Continent who are mad behind cricket. Many of these people have been residents for many years. They form majority in some nations and also form a large chunk of population. If they were allowed to become citizens then we would have never had the issue of non passport holder teams. When they have made these nations their home hence as residents they should and are allowed to play the game.
Most of the members of these are from South Asia
Hong Kong:- Cricket has always been played by British and many South Asians that settled there. There are many cricket clubs and cricket grounds. Cricket is Sustained because of the South Asian who for generations have been living there.
Malaysia, Singapore:- The Indians living for many generations have been playing cricket. South Asians are the people like Hong Kong who are sustaining the game. Now challenge is to take it to the ethnic Chinese and Malays
Myanmar:- Once Myanmar defeated Sri Lankans before independence. The large Indian population which formed the majority in Capital was behind the game. Then Burma shut itself and Indians began to leave. This also led to cricket just vanishing. Now it has started, but with very few Indians it will take a time
Outside Asia:- Kenya, Uganda, Tanzania, Canada, USA:-Also had the game being rekindled or sustained because of South Asians