I upgraded to iOS 17 when it was just released in Developer Beta, and I have been using it for over a month without encountering any issues with banking apps. The banking apps I frequently use include HBL Connect, MAE, M2U Biz MY, OCBC Bank, Rize, and Standard Chartered. Of course, other finance-related apps such as BigPay, Boost, TnG eWallet, Wise, PayPal, Setel, Atome, etc. can also be used normally.