Define it more specifically as property Text textItem

You can just make the textWrapper be a MouseArea, saves you having an extra area inside

You can simplify this long duration handling a bit:

Timer {
    interval: 500
    running: area.containsMouse
    onTriggered: {
        area.state = "longHovering"
    }
}

and then all you need is

onContainsMouseChanged: {
    if (!containsMouse) {
        area.state = "";
    }
}

I *think* you could even do it more declaratively by having the State do

when: area.containsMouse && !timer.running

but since property evaluation order is non-deterministic, it might briefly enter the state on hover

I think this item could use a better name, maybe TextHoverScroller or something like that?

QML trick: Define the property as default property and then you can just write

TextWrapper {
    Text {
        ...
    }
}

I think you can assign undefined to reset it to its default value. Plasma Label annoyingly overwrites its height

Coding style: space before ?

Generally try to avoid binding to visible as that updates recursively. Since this contains the label below, you can probably just make this visible: artistText.text !== "" and then remove the visible statement below