Please check if the F&O derivatives segment is activated for you. To do this, please follow the steps below
Double click on your name and check exchanges - (NFO should be enabled) -
If yes and still not able to add scrip of F&O then clear the app data and check
To learn how to clear your app data, you can follow along with a similar problem-based article here
Why is there a mismatch of profit and loss and the quantity of my open positions on InstaTrade and the Neo App/Web?
When I have squared off my positions, why are they still reflecting as an open positions on InstaTrade?
Why was the InstaTrade square-off order rejected?
If I modify or cancel my InstaTrade orders from the Neo App/Web, will it update on InstaTrade as well?