Im someone who studies history in India and i can say that the subject is not very common as a field of study in india. Having said that there are a decent number of history students and historians in the country, its just that almost none of them are on reddit, let alone r/askhistorians. I try and answer india questions when i can but that is a miniscule effort for a country this size. I really do wish there were more indian historians on here.
Edit: i was caught up with academic work this week and was not on reddit. I missed the fact that this was India week. Would have participated more if i knew.
Even considering the size of India's population you have to consider those who have access to internet, know that reddit.com as a site exists, and are academically trained, know that /r/AskHistorians is even a thing, and are willing to answer questions.
If you look at Alexa rankings for reddit you'll find that the data on traffic from India is so low it's not even noteworthy. Traffic for Germany is 2.1% so it's going to be even below that.
If anyone has full access/an account for Alexa rankings it'd be interesting to see if reddit even appears in the top 500 most visited sites in India - but for non-account/free access you can see it's not in the top 50.
There was a META thread about the same thing a while back that you can read here. Personally I agree most with the comment by /u/Tiako here.
Besides that I know one Indian Historian who sometimes comments on this subreddit and looking through his post history he didn't answer any questions over this period. Obviously it might have just been that he didn't want to, but maybe he simply didn't know about this week's theme?
The same happened when Indonesia was the theme of the week. These are interesting themes to pick, but if there is noone that is able or willing to answer the questions then it's a bit pointless to have these themes.
I'd say it's more likely that those people either aren't on Reddit or don't sub r/askhistorians
I tried my best by cross posting interesting questions on IndiaSpeaks. We have history buffs like /u/Sikander-i-Sani /u/RajaRajaC and /u/Lunginator on our sub.
While the answers about internet demographics are correct, it's also important to note that Indians developed history fairly late. We do not get native sources reporting on Indian history (in a chronological sense) until the 12th century (and we don't see a real proliferation until the next two centuries). You also don't have neighboring people writing down history until around that period either. And you don't see pure historians until European influence comes in.
This makes nearly everything more difficult. Without a detailed record, we rely more heavily on archeology, primary sources meant to record current events, and incidental records like edicts or trade reports. This can make context a bit difficult and severs a lot of what the historical Indians thought themselves from us.
I'm sorry I missed India week. I've studied Indian history extensively and would have loved to be on here more. Feel free to cross post to r/India. I like that sub and the number of Indians on Reddit is growing pretty fast now.
While there is a good deal of discussion here, especially in links to earlier discussion, unfortunately, due to either factors on reddit or just general interest, we don't have a lot of Indian flairs! If you know someone or could encourage someone to get involved, please see the flair requirements here! I asked a lot of India questions this week so I would really love to see more involvement by experts in/of India too!