How to reproduce horizontal flow layout as custom layout in embed.diagrams.net / draw.io?

I would like to programmatically trigger a layout operation for diagrams.net.

I would like to use the horizontal flow layout that is available in the ui and as style:

style="childLayout=flowLayout;flowOrientation=west;"

However, for the api there is no type mxFHorizontalFlowLayout.

=> How to reproduce the horizontal flow layout specified as style, based on the supported layout types?

=> Or how can I trigger an update of the layout, based on the already specified style? (Unfortunately, draw.io does not apply the style automatically but only after manual edits.)

I tried to use mxHierarchicalLayout but I get different results.

        /* available layouts:
        https://www.drawio.com/doc/faq/apply-layouts#custom-layouts

        0 : "mxHierarchicalLayout"
        1 : "mxCircleLayout"
        2 : "mxCompactTreeLayout"
        3 : "mxEdgeLabelLayout"
        4 : "mxFastOrganicLayout"
        5 : "mxParallelEdgeLayout"
        6 : "mxPartitionLayout"
        7 : "mxRadialTreeLayout"
        8 : "mxStackLayout
        */

   function sendLayoutMessage() {{
        // tries to apply a horizontal flow layout
        console.log('layout');
        var iframe = document.getElementById('drawio-iframe');
        var layoutMessage = JSON.stringify({{
            action: 'layout',
            layouts: [
                {{
                    "layout": "mxHierarchicalLayout",
                    "config": {{
                      "orientation": "west",
                      "intraCellSpacing": 0.1,
                      "interRankCellSpacing": 0.1,
                      "interHierarchySpacing": 0.1,
                      "parallelEdgeSpacing": 0.1
                    }}                       
                }}
            ]
        }});
        iframe.contentWindow.postMessage(layoutMessage, '*');
    }}