It’s impossible to achieve your goal with a sheet. The best way might be to create your own view that behaves like a sheet. It’s not difficult.

struct Foo: View {
  @State var isSheetVisible = false
  
  var body: some View {
    ZStack {
      if isSheetVisible {
       // your "sheet view" code and animation
      }
      
      YourCutomView() // this view will remain front
    }
    
  }
}

If you have any more questions about this, please let me know.