"What is happening with these returns?"

Are you signed up for governmental e-newsletters? The IRS puts out notices that will go to your email. This one was recently covered.

https://www.irs.gov/newsroom/irs-statement-providing-meaningful-assistance-to-taxpayers-in-the-curre...

https://www.journalofaccountancy.com/news/2022/jan/aicpa-notes-irs-announcement-on-notices-asks-more...

But they also mention:

"Due to processing delays for 2019 and 2020 tax returns, the issuance of CP80 and CP080 (Unfiled Tax Return – Credit on Account) notices has been suspended. If you received a notice for your 2019 return and you filed timely, please refile the return. If you received a notice for your 2020 return DO NOT refile."