.Clipped() not working on Pickers SwiftUI

I need to create a view that has 2 Pickers and 2 DatePickers.

In order to avoid having them overlapping each other, I used .clipped(). However, this is not working.

I can successfully resize the pickers, but I cannot limit the "selection area" to their frame size.

Here is my code:

VStack(spacing: 10) {
        Picker(selection: self.$dayTypeSelectedIndex, label: Text("")) {
            ForEach(0 ..< self.dayTypes.count, id: \.self) {
                Text(self.dayTypes[$0])
                    .foregroundColor(Color.black)
            }
        }
        .pickerStyle(SegmentedPickerStyle())
        .labelsHidden()
        .clipped()
        
        Spacer()
        
        Group {
            DatePicker("", selection: self.$dateIntervalStart, displayedComponents: .hourAndMinute)
                .labelsHidden()
                .colorInvert()
                .colorMultiply(Color.black)
                .frame(maxHeight: 50)
                .clipped()
            
            Spacer()
            
            Text("às")
                .foregroundColor(Color.black)
            
            Spacer()
            
            DatePicker("", selection: self.$dateIntervalEnd, displayedComponents: .hourAndMinute)
                .labelsHidden()
                .colorInvert()
                .colorMultiply(Color.black)
                .frame(maxHeight: 50)
                .clipped()
        }
        
        Spacer()
        
        HStack {
            Picker(selection: self.$tripNotificationDelta, label: Text("")) {
                ForEach(0...60, id: \.self) {
                    Text($0 < 10 ? "0\($0)" : "\($0)")
                        .foregroundColor(Color.black)
                }
            }
            .labelsHidden()
            .frame(maxWidth: 50, maxHeight: 50)
            .clipped()

            Text("mins before trip")
                .foregroundColor(Color.black)
        }
    }
}

What am I doing wrong?

I'm using XCode 12. Plus, this interface is being built for devices not running iOS 14.

Thanks!