As an update - the $ is still in my account (I filed 3/26 with a payment of 3/29), but at least I was able to confirm that my tax returns were transmitted
I've created an account with the IRS.
Account Home -> Tax Records -> Get Transcript
I confirmed they are showing my 2020 Return Transcript and such... so I'm cautiously hoping there may be a delay in the federal e-file payment processing. Otherwise seems I may have to send a check with form 1040-V or use the IRS DirectPay online by May 17th, and pray that my original payments doesn't end up going through... not dealing with some trivial amount :(
