You can only download a .csv format statement from your iPhone or iPad. You can download it on your phone and send it to your Mac (step 4 below) as described in the following from Download or export your Apple Card statements and transactions - Apple Support
How to export your Apple Card statements
- On your iPhone, open the Wallet app and tap Apple Card. On your iPad, open Settings, tap Wallet & Apple Pay, then tap Apple Card.
- Tap Card Balance.
- Scroll down and select the Statement that you want to export.
- Tap Export Transactions, then tap the share button to email, print, save, or share the file.
If your iPhone has iOS 13.2 or later or your iPad has the latest version of iPadOS, you can export or download transactions from a previous month as a .CSV, .OFX, .QFX, or .QBO file.