Extend Unemployment Assistance Act of 2021 This bill extends pandemic unemployment compensation provisions set to expire on September 6, 2021, until February 1, 2022. Extended provisions include benefits to covered individuals who are not eligible for regular unemployment compensation or traditional extended benefits, the $300 weekly benefit increase, waiting week benefits, and federal reimbursement of short-time compensation. The bill also increases the maximum duration of compensation from 79 weeks to 100 weeks.