Foxconn did not immediately respond to a request for comment, but has previously said it does not comment on client-specific work.
Apple has been shifting some areas of production from China to other markets as it navigates the trade war between Washington and Beijing. A person familiar with the matter said in November Foxconn is moving some iPad and MacBook assembly to Vietnam from China at its request.
Cupertino, California-headquartered Apple has bet big on India since it begin iPhone assembly in the country in 2017 via another Taiwanese supplier, Wistron.
Foxconn, Wistron, and a third supplier Pegatron have together committed roughly $900 million (roughly Rs. 6,540 crore) over five years to make iPhone models in India, leveraging New Delhi's $6.7 billion (roughly Rs. 48,660 crore) plan to boost smartphone exports.
Apple is also planning to bring the assembly of its iPad tablet to India, Reuters reported last month.
"Nice to see our efforts to make India a big hub of mobile and components manufacturing is attracting global attention," India's technology minister Ravi Shankar Prasad tweeted following news of iPhone 12 production in India.