Does JEE Mains and Advanced has Defence Quota reservation?

yes See below
Categories are broadly segregated as follows-

General :

SC (Scheduled Caste)

ST (Scheduled Tribes)

BC-NCL (Backward Classes if they belong to the Non-Creamy Layer)

PwD (Persons with Disability)
Note: BC-NCL candidates will have to satisfy the cast and non-creamy layer requirements as per the National Commission of Backward Classes (NCBC) guidelines
Other categories that are applicable are:

J & K Migrants

Defence