Sorry, Apple is not able to make individual replies. The issue is Mint will require web access and that is unlikely to happen.
I’m not really sure it’s that big a deal. The interest is compounded daily, but only added at the last of the month. Data can be manually added and the beginning and ending balance is shown on the statement. It took me about 30 seconds to download the statement, and add the figures to Mint. Yes, automation would be wonderful. But in the overall scheme of things the interest earned in Apple Savings more than pays for the 20 to 30 seconds to input data.