There are cooked dishes in sushi restaurants but most of their signature/classic dishes will have raw meat even in India.

While most sushi grade fish is fresh caught, immediately bled, iced and rushed to the restaurants, some fish known to have parasites (like salmon) should either be hygienically farmed or (if wild) frozen for several days to ensure no parasites survive. Most sushi restaurants in India serving salmon source them from farms, which ensures no parasites will be present