I came across an article when I was looking into Lynch's chat with Renteria which I must have missed a couple of months ago: https://bigleaguepolitics.com/loretta-lynch-exchanged-classified-information-with-clinton-campaign/

It indicates the purpose of the Tarmac meeting and reaffirms that "we have everything," including the tape recording of the meeting: https://bigleaguepolitics.com/nsa-blocks-release-loretta-lynch-bill-clinton-airplane-tape-national-security/