Today I learned how to implement tap anywhere to dismiss the keyboard on SwiftUI.

In your parent stack, either VStack or HStack, add the following code.

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.contentShape(Rectangle())
.onTapGesture {
     UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
}

The most important thing to take note here is the contentShape modifier or tap gesture will not work.