You will have to use the Kotak Securities Neo mobile app for viewing this. In the Neo app,
1. Go to profile section from the top right corner of your home screen
2. Click on reports and statements
3. Click on DP/Demat holdings. You will be redirected to the Kotak Securities website where you will be able to view your demat holdings.
To know how to set up your account on the Neo mobile app, click here.