They are in a big queue. The IRS is seriously backlogged due to all the extra stimulus filings, as well as a few million unprocessed 2019 returns left over from the COVID shutdown. Lots of other folks are still waiting, so please continue to be patient. Also see:
The IRS is under serious stress — what does that mean for your refund? (msn.com)
What led to IRS backlog: ‘Thin workforce,’ new pandemic relief programs | Federal News Network