BO/CO is blocked only for Banknifty options. It is not blocked for Nifty options, it’s very much available. Read more as to why BO/CO is blocked for Banknifty options in the link below:
Yes, you can continue placing BO/CO orders for Equity, Equity Futures as well as Index Futures/options.
Note: CO is blocked for Equity options as it’s a market order and market orders are blocked for equity options. Reason for blocking is explained below: