I can get every published page recursively and display the ones of the documentTypes i want.

But im having trouble converting these pages (IPublishedContent into some sort of list or collection to be sorted by date.

I tried just appending the "content" var in the loop to an array, list, collection and ienumerable of IPublishedContent. But the list was always empty at runtime. The code below works, but im not sure how i would make it display ordered by lastUpdateDate.

string[] docTypes = new string[] { "modPage"};
var results = Umbraco.AssignedContentItem.Children().Where(x => x.IsVisible());
void DisplayAllPagesOfType(IEnumerable<IPublishedContent> pages)
{
    @foreach (var content in pages)
    {
        if (content != null)
        {
            bool isDoctypeMatch = false;
            foreach (string docTyp in docTypes)
            {
                if (content.IsDocumentType(docTyp))
                {
                    isDoctypeMatch = true;
                    break;
                }
            }

            @if (isDoctypeMatch)
            {
                <div class="childBlock">
                    <a href="@content.Url()" class="indexBlockBtn btn" type="button"><b>@content.Name</b></a>
                    @if (content.Value<IEnumerable<IPublishedContent>>("gallery") != null)
                    {
                        var images = content.Value<IEnumerable<IPublishedContent>>("gallery");
                        if (images.Count() > 0)
                        {
                            <img class="img-fluid" src="@images.FirstOrDefault().GetCropUrl()" alt="@images.FirstOrDefault().Name" />
                        }
                    }
                    <div style="text-align:center">
                        @Html.Raw( content.Value("blurb"))
                        @Html.Raw(content.Value("fullDescription"))
                    </div>
                </div>
            }

        }
        var children = content.Children().Where(x => x.IsVisible());
        DisplayAllPagesOfType(children);
    }
}

heres an updated script attempting to display by uiterating over a list of iPublishedContents. It executes without error, but only display a "0" in H1 for each returned page

string[] docTypes = new string[] { "modPage"};
var results = Umbraco.AssignedContentItem.Children().Where(x => x.IsVisible());

List<IPublishedContent> GetAllPagesOfType(IEnumerable < IPublishedContent > pages)
{
    List<IPublishedContent> resultsList = new List<IPublishedContent>();
    @foreach (IPublishedContent content in pages)
    {
        if (content != null)
        {
            foreach (string docTyp in docTypes)
            {
                if (content.IsDocumentType(docTyp))
                {
                    resultsList.Append(content);
                    <h1>@resultsList.Count()</h1>
                    break;
                }
            }
        }
        var children = content.Children().Where(x => x.IsVisible());
        GetAllPagesOfType(children);
    }

    return resultsList;
}

void DisplayPageBlock(IPublishedContent content)
{

    var images = content.Value<IEnumerable<IPublishedContent>>("gallery");
    <div class="childBlock">
        <a href="@content.Url()" class="indexBlockBtn btn" type="button"><b>@content.Name</b></a>
        @if (images.Count()>0)
        {
                <img class="img-fluid" src="@images.FirstOrDefault().GetCropUrl()" alt="@images.FirstOrDefault().Name" />
        }
        <div style="text-align:center">
            @Html.Raw( content.Value("blurb"))
            @Html.Raw(content.Value("fullDescription"))

          </div>
    </div>
}
void DisplayAllPageBlock()
{
    foreach (IPublishedContent content in GetAllPagesOfType(results))
    {
        DisplayPageBlock(content);
    }

}

}