Its all misinfo. The B2s Came through Atlantic, via Gibraltar, Israel, Jordan, Iraq and hit Iran (since US has no threats and does not need any permissions for this route so it makes the most sense fo them). India is nowhere in the way. US has release all of the maps of their attacks. These claims have been debunked several times since yesterday.
Even if they did use India, they would have likely passed through Pakistani airspace too. So implicating India also means implicating Pakistan. Finally, B2s get air refueling, they have 12K KMs range and they do not need anyone's airbases to launch attacks, that is their whole edge.
Again, in any case, there was no attack via the East. The earlier reports of US coming via Guam were confirmed to be a distraction tactic.