Get Nodes By Guid

NodeID/NodeGuid are not culture specific, so if your website does use multiple cultures, ideally you would specify the culture to filter to the appropriate node.

If you were using DocumentID/DocumentGuid then you would not need to specify a culture as it is already culture specific.

You could do something like:

            var treeNode = DocumentHelper.GetDocuments()
            .TopN(1)
            .Published()
            .WhereEquals(nameof(TreeNode.NodeGUID), /* pass node guid */)
            .Culture(/* pass culture code */)
            .FirstOrDefault();

You've mentioned that you only want the NodeID too, maybe restrict the columns being returned by adding: .Column(nameof(TreeNode.NodeID))

Since you're using Kentico Xperience 13, you might want to try alternative API methods of retrieving pages too, maybe look through https://docs.xperience.io/custom-development/working-with-pages-in-the-api

Thanks Liam Goldfinch, Is DocumentHelper the best practice for Kentico 13 on the admin site?

I was hoping for something like IPageRetriever, but this seems to be aimed at the Content Delivery site