I think what really makes this so frustrating is that this year there is no extended deadline.

I hope IRS would extend the deadline to avoid more problems on their end.  For instance, I have a client whose return was electronically filed last May.  Yet, her transcript shows no return filed.  We did get through to IRS and I gave them confirmation number from Form 9325.  They found the return in a department for special handling, whatever that means.  Anyway, she had an overpayment of $5000 which was applied to 2021.   You know we are going to claim the credit and you know IRS will send her a bill for $5000.  How long is it going to take to straighten that one out?  If IRS set the date back a month or two and worked to clear up the 2020 backlog, they will eliminate problems such as this.

Anyway, the missing forms at this late date is problematic.