WhatsApp update: Only these users can HIDE online status - Here is how
WhatsApp update: If the feature was not available for you, maybe it is finally released to your WhatsApp account today: just check WhatsApp Settings > Account > Privacy. If you see “Last seen and online”, it means you can finally manage who can see when you’re online on WhatsApp.
In case the feature is still not available for your WhatsApp account, you are out of luck and you have to wait for another update.