As someone that’s studied the Mughals quite a bit, but hasn’t studied Indian history more broadly as extensively, here are a few thoughts:

- the monuments are obvious points; the Taj Mahal is probably one of the few buildings that the average Western person has heard of

- there is more of a connection, or appears to be, with other empires that Westerners are more familiar with. For example, the Mughals were functionally descendants of the Mongols (indeed the word itself came from it). They also were roughly contemporaneous with the Ottomans during key historical periods, so their categorization as a “gunpowder empire” along with Iran is a known thing.

The prestige languages of all three of these empires was also highly Persianized, which maybe made them more accessible to the West, which was familiar with the Arabic alphabet and Islamic civilization for a longer period than with India. IIRC a lot of foundational Indian works weren’t really translated from Sanskrit to western languages until the mid 1800s.

That is how I myself started reading more about the Mughals: via being interested in the Ottomans.

- And finally there are a number of unique Mughal figures that have managed to become well-known in the West. Akbar, Shah Jahan, etc. I’m sure there were equally interesting people from other Indian empires but they don’t seem to be talked about as much.