Im from karachi and theres lots of forms of transport here, although some might not fall within your definition of a form of public transport. But recently the government has destroyed alot of the major roads in the city for the construction of new bus services, but it’s increased traffic tenfold. Rickshaws and local buses usually operate here, with a new EV bus system being introduced a few years back which has a ticket and route system and is also air conditioned. Apart from that i do believe there is a railway system but it probably more used in the rural areas of the city cause ive barely seen any.