My federal return was accepted by the IRS on 2/13/21, and was approved for a $500 refund advance loan, but I still haven't received my refund. I have friends who were given a specific date, right do

Most taxpayers will receive their refund within 21 business days after acceptance, 

You can track your return on the Where's My Refund website. 

If it has been 21 days, you can contact the IRS to inquire about the status of the return.