Check this thread -
Also, a Notification was issued by RBI on 23rd October 2020 (to be called Foreign Exchange Management (Margin for Derivative Contracts) Regulations, 2020), which mentioned the following (on Page 3) -
3. Prohibition
Save as otherwise provided in these regulations and any other regulations issued under the Act and in force on the date of commencement of these regulations, no person shall post or collect margin for derivative contracts and pay or receive interest on such margin without the prior permission of the Reserve Bank.
I have come across IBKR, which appears to allow buying options and deploying certain other option strategies to its Indian customers but after the new Notification from RBI, it seems even that would be not possible.