what's new in iOS 15

I don't have specific information about iOS 15 from the context provided. However, I can share some updates from more recent iOS versions discussed at WWDC. For instance, iOS 18 introduced new customization options, such as controls that can be added to the control center and lock screen, and a new locked camera capture framework. Additionally, app icons and widgets can now appear in light, dark, or tinted versions to provide a consistent visual experience. If you have questions about these or other recent updates, feel free to ask!