From the IRS website:
As of April 29, 2022, we had 9.6 million unprocessed individual returns which include returns received before 2022, and new tax year 2021 returns. Of these, 2.9 million returns require error correction or other special handling, and 6.7 million are paper returns waiting to be reviewed and processed.
https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue#coll...
It would not surprise me if it takes six months (or even a year or more) for the IRS to reduce the backlog on paper returns.
