Yeah, this is frustrating for me too. I use Banktivity, and have my Apple card setup so i use it for most of my transactions, and pay off the balance in full every month. It has essentially taken the place of my debit card and thus I use it the most.
With Banktivity it would download all my debit transactions direct from my banks website and all i would need to do is categorize them correctly and add notes to some of them.
With Apple Card im back to manually entering every single transaction.
Whatever time im saving in a checkout line using Apple Pay, im losing more when accounting time comes.
A CSV export / "download your Apple Card data" option would be so easy to implement for them, i cant help but think that its omission is by their choice. Hope there is enough user frustration that they implement it.
But ideally they should also support direct connect. Perhaps this would need to go through Sachs...perhaps there are privacy issues with that, I dont know.