Where is the payment information shown in the printed record documents for an amended return?

I E-Filed an Amended Tax Return amending my year 2020 return.  I owed an additional $6.  When completing the process, I indicated I wanted the payment to occur on 4/1/2021 directly from my checking account.  So far, the payment has not been withdrawn from my checking account.  Everything was normal when I created and filed the amended return.  I went to check my record documents to ensure the information was correct but I am unable to find the information about the payment relating to the additional $6 that is owed and having it withdrawn from my checking account on 4/1/2021.  Where is this information recorded in the record documents?  When a payment is done using this method, is it normal for it to take a couple of days past the requested date?