如何在返回后刷新页面。不调用OnAppearing

public MainPage()
{
    InitializeComponent();
    Shell.Current.NavigatingBack += Current_NavigatingBack;
}

private void Current_NavigatingBack(object sender, ShellNavigatingEventArgs e)
{
    // 执行页面刷新逻辑
    RefreshPage();
}

protected override void OnDisappearing()
{
    base.OnDisappearing();
    // 发布刷新页面的消息
    MessagingCenter.Send(this, "RefreshPage");
}

public MainPage()
{
    InitializeComponent();
    // 订阅刷新页面的消息
    MessagingCenter.Subscribe<Page>(this, "RefreshPage", (sender) => {
        // 执行页面刷新逻辑
        RefreshPage();
    });
}

protected override void OnDisappearing()
{
    base.OnDisappearing();
    // 取消订阅刷新页面的消息
    MessagingCenter.Unsubscribe<Page>(this, "RefreshPage");
}

public event EventHandler RefreshPageEvent;

protected override void OnDisappearing()
{
    base.OnDisappearing();
    // 触发刷新页面事件
    RefreshPageEvent?.Invoke(this, EventArgs.Empty);
}

public MainPage()
{
    InitializeComponent();
    // 订阅刷新页面事件
    nextPage.RefreshPageEvent += NextPage_RefreshPageEvent;
}

private void NextPage_RefreshPageEvent(object sender, EventArgs e)
{
    // 执行页面刷新逻辑
    RefreshPage();
}

protected override void OnDisappearing()
{
    base.OnDisappearing();
    // 取消订阅刷新页面事件
    nextPage.RefreshPageEvent -= NextPage_RefreshPageEvent;
}