Just an FYI that the Banktivity mobile apps (which can sync with the Mac app) do allow direct download to Apple Card accounts. That said - after trying it out when it first came out and spending the next large chunk of time deleting years of duplicated transactions, I’m back to manually downloading and importing into Banktivity.
It’s not all that annoying to do compared with other credit card companies. I download the files on my phone each month and save you an iCloud Drive folder, and by the time I open my MacBook the file is there.