The Qt control fails to display the candidate word area above the virtual keyboard. It only appears when the candidate word area is configured to display below the virtual keyboard (within the keyboard area).

//Src: keyboard.qml
ListView {
        id: wordCandidateView
        objectName: "wordCandidateView"
        clip: false
        z: 2
        property bool empty: true
        readonly property bool visibleCondition: (((!wordCandidateView.empty || wordCandidateViewAutoHideTimer.running) &&
                                                   InputContext.inputEngine.wordCandidateListVisibleHint) ||VirtualKeyboardSettings.wordCandidateList.alwaysVisible) &&
                                                 keyboard.active        onVisibleConditionChanged: {
              console.log("visibleCondition changed:", visibleCondition);
          }        readonly property real visibleYOffset: -height
        readonly property real currentYOffset: visibleCondition ? visibleYOffset : 0
        height: style ? style.selectionListHeight : 0        onHeightChanged: {
            console.log("wordCandidateView new height:", height);
        }
        anchors.left: parent.left
        anchors.right: parent.right
        spacing: 0
        orientation: ListView.Horizontal
        snapMode: ListView.SnapToItem
        delegate: style.selectionListDelegate
        highlight: style.selectionListHighlight ? style.selectionListHighlight : defaultHighlight
        highlightMoveDuration: 0
        highlightResizeDuration: 0
        add: !keyboard.noAnimations ? style.selectionListAdd : null
        remove: !keyboard.noAnimations ? style.selectionListRemove : null
        y:wordCandidateView.visibleYOffset //change init location make it up to down
        Component.onCompleted: {
        console.log("wordCandidateView finished initializing, visibleCondition =", visibleCondition);
        console.log("wordCandidateView count:",wordCandidateView.model.count);
        console.log("wordCandidateView model:", wordCandidateView.model);        console.log("wordCandidateView height:", height);
        console.log("wordCandidateView y:", y);
        console.log("visibleYOffset:", visibleYOffset);    }        keyNavigationWraps: true
        model: InputContext.inputEngine.wordCandidateListModel
        onCurrentItemChanged: if (currentItem) soundEffect.register(currentItem.soundEffect)
        Connections {
            target: wordCandidateView.model ? wordCandidateView.model : null
            function onActiveItemChanged(index) { wordCandidateView.currentIndex = index }
            function onItemSelected() { if (wordCandidateView.currentItem) soundEffect.play(wordCandidateView.currentItem.soundEffect) }
            function onCountChanged() {
                console.log("wordCandidateView model.count:", wordCandidateView.model.count);
                var empty = wordCandidateView.model.count === 0
                if (empty)
                    wordCandidateViewAutoHideTimer.restart()
                else
                    wordCandidateViewAutoHideTimer.stop()
                wordCandidateView.empty = empty
                keyboard.hideWordCandidateContextMenu()
            }
        }
        Connections {
            target: InputContext.priv
            function onInputItemChanged() { wordCandidateViewAutoHideTimer.stop() }
        }
        Connections {
            target: InputContext.inputEngine
            function onWordCandidateListVisibleHintChanged() { wordCandidateViewAutoHideTimer.stop() }
        }
        Timer {
            id: wordCandidateViewAutoHideTimer
            interval: VirtualKeyboardSettings.wordCandidateList.autoHideDelay
        }
        Loader {
            sourceComponent: style.selectionListBackground
            anchors.fill: parent
            z: -2
        }
        Component {
            id: defaultHighlight
            Item {}
        }
        states: [
            State {
                name: "visible"
                when: wordCandidateView.visibleCondition
                PropertyChanges {
                    target: wordCandidateView
                     y:0
                }            },
            State {
                name: "alwaysVisible"
                when: keyboard.fullScreenMode || VirtualKeyboardSettings.wordCandidateList.alwaysVisible
                PropertyChanges {
                    target: wordCandidateView
                    y: wordCandidateView.visibleYOffset
                }
            }
        ]
        transitions: Transition {
            id: wordCandidateViewTransition
            from: ""
            to: "visible"
            enabled: true
            reversible: true
            onRunningChanged: {
                      if (running) {
                          console.log("[DEBUG] Transition to 'visible' state started111.");
                      } else {
                          console.log("[DEBUG] Transition to 'visible' state ended. Current y:", wordCandidateView.y);
                      }
                  }
            ParallelAnimation {
                NumberAnimation {
                    properties: "y"
                    duration: 250
                    easing.type: Easing.InOutQuad
                }
            }        }        function longPressItem(index) {
            return keyboard.showWordCandidateContextMenu(index)
        }
    }