It is a new feature by BIS for registered manufacturers to send any enquiry related to portal, payment, etc online via portal. The ideal way to send an email to BIS, however new feature in portal would make the process easier.

Navigating Regulatory Compliance: “S” Band and WPC Licensing
Question: If a non-Telecom product you want to sell in India has WiFi 11abgn, BT/BLE, LTE, Satellite “S” band Tx & Rx, 60GHz “V” band