What limited wartime naval repair in India?

Could India have supported major shipbuilding and repair for the Far Eastern fleet?

It had substantial repair yards, but armor-grade steel production was the major missing capability when war began.

The answer corrects the idea that India had no serious shipyard facilities. Large yards could maintain and repair warships, and ships continued to use Indian and South African facilities during the Second World War. The binding constraint was the supply of armor and armor-grade steel. Plans to establish that industrial capability existed in the 1930s but were incomplete when war began. The distinction matters because dock capacity and specialized material production are separate parts of naval logistics. A yard can handle extensive work while still depending on distant industry for critical plate.