Apple has added a new "Insights" feature to the Wallet app in the second iOS 27 beta. Accessible by tapping the three dots in the upper right corner, Insights appears to let users add different financial accounts to monitor their spending.
Tapping on the Continue button on the splash screen goes to the Add to Wallet interface with no new options available, so it does not appear to be functional at this time.
Apple has detailed transaction information for the Apple Card, but support for other cards and accounts has been limited. Apple did introduce a Connected Cards feature in iOS 17.1, but it saw limited adoption. Discover implemented support and users could see their total card balance, Pay with Rewards, and transaction history, but Discover removed the functionality in early June and almost no other U.S. issuers ever used it. Several UK banks still have deeper integration with the Wallet app's Connected Cards option.
It looks like Insights could be a successor to Connected Cards that will work without card issuers specifically adding in support.