Haru Mining is available for the app version 2.17.6 and above. If you cannot see Haru Mining in your Haru app, you have to follow the steps below to update the app manually or see here:
Verify the app version by navigating to "More" > "App Version". If outdated, a refresh circle icon will appear next to the version number. Wait for a few seconds until you see the Update button for minor updates.
When completed, the App Version number will be updated to the latest.
Should you need any further assistance, please submit a request here.