The IRS is calculating separate tax refunds for the unemployment compensation exclusion for all those that are eligible. They are sending the refunds in batches which started in May and are continuing throughout the summer.
Go to these IRS websites for information -
https://www.irs.gov/newsroom/2020-unemployment-compensation-exclusion-faqs
You will get a federal income tax refund for the unemployment exclusion if all of the following are true.
If all four of those conditions are true, The IRS will recalculate your tax return and send you a refund. It might be a couple of months before you get it. For more information see the links that DoninGA posted above.