[Ask] macOS: Vertical Pager shows unwanted outer padding

[tamnh-maplelabs]

On macOS, using SwiftUIPager in vertical mode, each page shows a thin outer margin (background “halo”) even when each page view is sized to the window and .expandPageToEdges() is applied.

Expected behavior
• Each page should fill the available space exactly (full-bleed) with no visible margins around the page content.
• If there are default insets, there should be a public API to set them to zero.

Actual behavior
• A teal color thin border/margin remains visible around pages (seen as the parent background color).
• Button move up at page 2 does't work

Environment
• SwiftUIPager: 2.5.0
• macOS: 15.5
• Xcode: 16.3
• Swift: 6.0

Minimal Reproducible Example
`
import SwiftUIPager

struct HomeView: View {
@State private var name: String = ""
@State private var countdown: Int = 60
@StateObject private var page: Page = .first()
@State private var mouseIsOnCards = false

var body: some View {
    GeometryReader { geo in
        Pager(page: page,
              data: [0, 1],
              id: \.self) { pageIndex in
            VStack(spacing: 20) {
                if pageIndex == 0 {
                    Text("Countdown: \(countdown)")
                        .font(.largeTitle)
                    Button {
                        withAnimation {
                            page.update(.next)
                        }
                    } label: {
                        Image(systemName: "arrow.down.circle.fill")
                            .font(.system(size: 40))
                            .foregroundColor(.purple)
                    }
                } else if pageIndex == 1 {
                    TextField("Enter name", text: $name)
                        .textFieldStyle(RoundedBorderTextFieldStyle())
                        .padding(.horizontal)
                    Button("Add") {
                    }
                    .font(.title2)
                    .padding()
                    .background(Color.red)
                    .foregroundColor(.white)
                    .cornerRadius(10)
                }
            }
            .frame(width: geo.size.width, height: geo.size.height)
            .background(pageIndex == 0 ? .black : .white)
            .overlay(alignment: .bottomTrailing) {
                if pageIndex == 1 {
                    Button {
                        page.update(.moveToFirst)
                    } label: {
                        Image(systemName: "chevron.up.circle")
                            .font(.system(size: 40))
                            .background(Color.blue, in: .circle)
                    }
                }
            }
        }
        .pagingPriority(.simultaneous)
        .vertical()
        .interactive(scale: 1.0)
        .swipeInteractionArea(.allAvailable)
        .sensitivity(.medium)
        .expandPageToEdges()
        .background(Color.green)
    }
    .background(Color.orange)
}

}
`

What I’ve tried
• Ensured each page view is frame(width: geo.size.width, height: geo.size.height).
• .expandPageToEdges(), .itemSpacing(.zero) (also tried without), .padding(.zero).
• Different modifier orders.
• Verified the margin is not from my own .padding (none present on the page container).

Questions
1. Is there a built-in way to remove any default insets/margins so a vertical Pager on macOS can be truly full-bleed?
2. Any recommended modifier order to guarantee no outer padding on macOS?
3. How to config button at page 2 correct to work

Thanks and regards,