Exactly the same frustration here!  I must check in here monthly to see if there is any integration, or solution to this issue.  If I can link Apple Card via Intuit Mint there is no reason it is not available in QBSE.  The workaround is time consuming and clunky, especially considering the extra time involved to change the debits to credits and visa versa due to how Apple Card transactions are listed.  I solely use Apple Card for business expenses and this is pretty ridiculous and unacceptable.