Yeah, the south was one of the most economically prosperous regions in the Indian subcontinent at the time. They were the centres of the spice trade, and a lot of colonial interest began there first. Because of the trade networks, a lot of outside cultural influence was part of the area's history. Judaism, Christianity, and Islam all came to the Malabar and Konkan coast just a few decades or tens of decades after they starting gaining traction in the Levant and other Middle-Eastern areas. In fact, Islam's first contact with the Indian subcontinent was on the Malabar coast and near it [0]. Colonial trading posts were set up in cities on the Malabar coast like Kochi [1] first, before they were set up in the North. In fact, after he died, Vasco da Gama was buried in a church in Kochi, Kerala, for many years before his son dug him up and took him back to Portugal [2]. My point is, a lot of stuff happened outside of the Gangetic Plains area, and not much is known about it in contemporary Western historical discourse.

[0] https://en.wikipedia.org/wiki/Islam_in_India#Early_history_o...

[1] https://en.wikipedia.org/wiki/Fort_Emmanuel

[2] https://en.wikipedia.org/wiki/Vasco_da_Gama#Death