SwiftUI Form background bug

Hello!

I have a swift "Form" in my code and I want to delete the default gray background behind. I tried all the solutions without getting anything! Do you have an advice to give me ?

I tried .background(Color.clear) by exemple. Here's the view of my code :

import SwiftUI

struct ParametersView: View {
    
    @Binding var isTimeRunning1: Bool
    @Binding var isTimeRunning2: Bool
    @Binding var parametersMinutesRemaining: Int
    @Binding var minuteRemaining1: Int
    @Binding var secondRemaining1: Int
    @Binding var minuteRemaining2: Int
    @Binding var secondRemaining2: Int
    
    var body: some View {
        VStack {
            Text("Parameters")
                .font(.system(size: 40, weight: .bold, design: .default))
                .padding(25)
            
            Form {
                Section(header: Text("Timer duration")) {
                    Stepper("Time (mn) : \(parametersMinutesRemaining) mn", value: $parametersMinutesRemaining, in: 1...30)
                }
                Button("Save", action: saveUser)
            }
            .background(Color.clear)
            .onAppear {
                UITableViewCell.appearance().backgroundColor = UIColor.clear
            }
            
            
        }
    }
    func saveUser() {
        minuteRemaining1 = parametersMinutesRemaining
        minuteRemaining2 = parametersMinutesRemaining
        isTimeRunning1 = false
        isTimeRunning2 = false
        secondRemaining1 = 0
        secondRemaining2 = 0
    }
}


struct ParametersView_Previews: PreviewProvider {
    static var previews: some View {
        ParametersView(isTimeRunning1: .constant(false), isTimeRunning2: .constant(false), parametersMinutesRemaining: .constant(10), minuteRemaining1: .constant(10), secondRemaining1: .constant(0), minuteRemaining2: .constant(10), secondRemaining2: .constant(0))
    }
}

He's long but it's just a exemple … Thank you very much for helping me, I am desperate …