What was the main difficulty which delayed the Constitution making in Pakistan?

The main difficulty that delayed the framing of Pakistan's Constitution after independence was the distribution of powers between the Federal Government and the Provincial Governments. East and West Pakistan had differing views on provincial autonomy, political representation, and the division of legislative and administrative authority. East Pakistan, with its larger population, demanded greater representation and provincial autonomy, while leaders from West Pakistan favored a stronger central government. These disagreements prolonged the constitutional process, resulting in Pakistan's first Constitution being adopted on 23 March 1956, nearly nine years after independence.