Yes, you can request an extension only for Phase 1 of the Evaluation Challenge.
To be eligible, the following criteria need to be fulfilled:
If you have maintained these criteria then 3 days before the end of the fourth week of your trading cycle, a button will appear on your dashboard. Press the button and extend 14 more days to trade!
Please refer to the image below for details of availing the extension.
Please note that you can only avail an extension once on your account. If you reset your account, you will become eligible to avail the extension again.