For now, just wait.
For my 2020 electronically filed return in June 2021, and the return was in this status for 13 months! Then I finally spent a day on the phone to reach IRS about this. Needed to call several times and wait on hold 2 hours several times to get to the right person and work around call disconnects. Finally did get the issue resolved, however! Honestly, it seems like the people who adjudicate and review returns are also the ones answering calls, and in my case (once I finally got the right person) they put me on hold and reviewed and cleared the return for refund.
Not a very good system, but I think the reality is this is how they are clearing the backlog of returns that need a review for anything involving an attached statement or election.
