Resigning the keyboard on drag in the list can be realised using a method on UIApplication window. For easier handling I created an extension on UIApplication and view modifier for this extension and finally an extension to View

Extension.swift

extension UIApplication {
    func endEditing(_ force: Bool) {
        self.windows
            .filter{$0.isKeyWindow}
            .first?
            .endEditing(force)
    }
}

struct ResignKeyboardOnDragGesture: ViewModifier {
    var gesture = DragGesture().onChanged{_ in
        UIApplication.shared.endEditing(true)
    }
    func body(content: Content) -> some View {
        content.gesture(gesture)
    }
}

extension View {
    func resignKeyboardOnDragGesture() -> some View {
        return modifier(ResignKeyboardOnDragGesture())
    }
}