CPA either didn’t file extension or IRS system didn’t receive it – I have proof saying she filed it but I did get a penalty for filing late

I asked my CPA to file an extension for me April 1st, and then followed up again on April 14th to see if she filed and she confirmed that she did. I have this in texts. I paid for & filed taxes early October, just got a letter from IRS that I have a late to file penalty. The extension is not listed in my transcript. CPA says she’s not surprised it’s not in the transcript “yet” – why wouldn’t it be if it was filed in April? Will I be able to get this waived by the IRS since I was under the impression that she did file it? First time abatement doesn’t apply for me.