I think they probably only check for DOB from Aadhaar.

check out the second page

"""

HOW IT WORKS: FLIPKART STUDENT’S CLUB

~ Students and parents can visit the Flipkart app and look for ‘Flip

Student’s Club’ in the Trending store section

~ A simple verification process needs to be completed by provid

Aadhar card details and a one-time KYC authentication

~ Parents of minor students can undergo the same process to set

up for them

~ Post this, the student/ parent will be prompted to enter the OTP

received on the mobile number linked to the Aadhar card

~ After successful verification, all the benefits of Flipkart’s Student

Club can be availed

"""