In case it helps anyone else, here is my final update:
I got mail from the IRS saying my amended return was processed but there was no change in tax due. I suspected that was for my first incorrect amended return filing. Then I noticed additional codes in my IRS transcript that with a new code 570, which I hoped was for my new return.
I tried calling the IRS number ending in 1040 and got put in the wrong queue that got a tired old-sounding lady answering three hours later that she just handles ordering of forms, thanks to the IRS changing from touch-tone options to a voice assistant. I think I said "need help with a mailed IRS form". She commiserated and said try not to say the word "forms" next time🥴
I figured I'd rather wait a couple months before I try that again, but I was relieved to see "Refund issued" and "Interest credited to your account" today in my transcript . It's dated 10/20 so I guess that's when I should receive it by and suppose interest should be according to that.
