Why BO order not unable for commodity?

In commodity trading only CO order is possible why not BO order? Tell me some reason

The permitted product types is decided by the exchange and not the broker. In this case, MCX does not allow BO in commodity trading.

If these are provided by exchange, then in equity markets, why only some brokers provide CO, not all?

But SOSO is provided BO order for commodity like crude oil then why not zerodha