Hi Samarth Jadhav,
i fyou are using a Mendix Cloud it is very simple. You can create a back up manually for your Production Environment and restore the back up file in QA environment. You can find the steps int he belwo documentation:
Create Back up : https://docs.mendix.com/developerportal/operate/create-backup
Restore a Back up : https://docs.mendix.com/developerportal/operate/restore-backup
If the Data is too huge make sure Both Production and QA does have the same database container plan.
Hope this helps!!