In the API review patch (https://codereview.qt-project.org/c/qt/qtgraphs/+/560943) there was a proposal to rename QML component properties as *Delegate: "Checking through Qt Quick's sources again, "labelDelegate" might be the best. We have editDelegate in TableView and cursorDelegate in TextEdit."

For Graphs2D this could mean:

• labelsComponent -> labelDelegate (note, removing also "s")
• barComponent -> barDelegate
• pointMarker -> pointDelegate