Preview and Simulator looks different Swiftui - xcode

Question

I have something like that for the first time. The preview and the simulator do not look identical. I really have no idea how to fix it. Normally the simulator and the preview should be identical?
But it may be that I've nested something but I don't know what exactly.
The images and code are below:
Simulator
Preview Layout
var body: some View {
ZStack {
Image("bg-official")
.resizable()
.edgesIgnoringSafeArea(.all)
VStack {
Spacer()
Text("NUMBER MATCH")
.fontWeight(.bold)
.font(.title)
GeometryReader { (geometry : GeometryProxy) in
ZStack {
RoundedRectangle(cornerRadius: 30)
.foregroundColor(Color("bg-roundedrectangle"))
.frame(width: 295, height: 310)
VStack(spacing: 3){
HStack(spacing: 3) {
Button {
} label: {
ZStack {
Rectangle()
.fill(Color.black.opacity(0.7))
.frame(width: geometry.size.width/3, height: geometry.size.height/5.5)
.cornerRadius(radius: 20, corners: [.topLeft])
Text("60 Seconds")
.font(.title3)
.foregroundColor(.white)
}
}
Button {
} label: {
ZStack {
Rectangle()
.fill(Color.black.opacity(0.7))
.frame(width: geometry.size.width/3, height: geometry.size.height/5.5)
.cornerRadius(radius: 20, corners: [.topRight])
Text("Endless")
.font(.title3)
.foregroundColor(.white)
}
}
}
HStack(spacing: 3) {
Spacer()
Button {
} label: {
ZStack {
Rectangle()
.fill(Color.white)
.frame(width: geometry.size.width/3, height: geometry.size.height/5.5)
.cornerRadius(radius: 20, corners: [.bottomLeft])
Text("Game Center")
.font(.title3)
.foregroundColor(.black)
}
}
Button {
withAnimation() {
sheetManager.present(with: .init(
systemName: "info",
title: "Game Info",
content: "The aim of this game is to match as many tiles as you can with the same number and earn points. Tap a tile to select it and tap another tile with matching number of the first tile you tapp ed. Be careful and quick; the game will end if you tap a wrong tile, if the timer runs out or if th board gets filled by tiles!"))
}
} label: {
ZStack {
Rectangle()
.fill(Color.white)
.frame(width: geometry.size.width/3, height: geometry.size.height/5.5)
.cornerRadius(radius: 20, corners: [.bottomRight])
Text("Game Info")
.font(.title3)
.foregroundColor(.black.opacity(0.9))
}
}
Spacer()
}
}
}
}
.popup(with: sheetManager)
}
}
}}