How to ignore Dynamic island's inset/padding

Question

I'm searching how this app ignore dynamic island's default inset, to set a gray background to is's bottom area. some app While I test every API AcitivityKit offer, I cant't extent my view to the inset. my app

I tried padding, contentMargins, none of these worked.

ActivityConfiguration(for: ONELiveActivityInfoAttributes.self) { context in
            // Lock screen
        } dynamicIsland: { context in
            DynamicIsland {
                DynamicIslandExpandedRegion(.leading, priority: 0) {
                    // some view
                }
                DynamicIslandExpandedRegion(.trailing) {
                    // some view
                }
                DynamicIslandExpandedRegion(.bottom, priority: 1) {
                    VStack {
                        Color.white
                    }.background(Color.white).padding(-100).offset(y: 10)
                }.contentMargins(.bottom, 3)
                
            } compactLeading: {

            } compactTrailing: {

            } minimal: {

            }
            .contentMargins(.all, 2, for: .expanded)
        }