[QT][QML][MAPBOX] Placeolder and route inside a map

[Shadow.01]

Dear users,

in my QML view in a QT 5 project I have the following code, which creates a Mapbox map; all works perfectly.

Plugin {
        id: mapboxglPlugin
        name: "mapboxgl"
    }
    
Map {
        anchors.fill: parent
        plugin: mapboxglPlugin
        center: QtPositioning.coordinate(59.91, 10.75) // Oslo
        zoomLevel: 14
    }

Now, I want add:

1. A placeholder / image in order to show the desired position on this map
2. A route, made by a series of segments

How can I do this? I searched in several search engines but I only found the way to show different layers but not what I am searching for.

Thank to all in advance!