Missing transactions since cut off date for updating Express Web Connect

Apparently I never received any notice that there was a cut-off date to update to the new Express Web Connect. The business I work for uses Discover. I had not imported transactions since the end of April. Last week, I downloaded the transactions from Discover, went to import them into QB as a qbo file and kept getting an error message that the transactions were in a file not supported by the banking institution. I went through all the troubleshooting steps, and eventually disconnected the Discover Account Center and added the new Discover Express Web. However, at this time I was unaware there was a difference, and while there were transactions from July to September, the transactions from April to June were missing. In desperation, I deleted the pending transactions that did appear. I then reached out to Intuit and connected with an agent who also didn't know what was going on. She even had me set up a test company. I then called Discover and it was Discover that told me that QB had disabled the ability to import transactions manually. The next day I called Intuit and was with an agent for two hours and she could also not figure out a way to import the missing transactions. Curiously, on Discover, the qbo file type is no longer there. Is there anything that can be done, or will I have to manually put in each individual transaction? I never got any notice and now I realized that I am probably going to have the same issue with Chase (since the cutoff date was 9/27/22).