Unsolved How to enable HandWriting on example of virtual keyboard

[KaviLin]

I'm trying to implement an app with feature HWR (handwriting recognize) on Win10/Linux.
After open examples (Qt Quick Virtual Keyboard - Basic Example ),
I found that HWR didn't appear in virtual keyboard. and also the fullscreen HWR is not working either when I set HandwritingInputPanelvisible forcibly.

the following is my config in basic.pro

CONFIG += link_pkgconfig disable-desktop myscript lang-all

Here are two questions need to help to solve.

1. how should I modify so that I can enable HWR in examle project.
2. Do I need to rebuild qtvirtualkeyboard to enable myscript sdk and put the output lib into plugin of my QT_INSTALL_PATH. base on https://doc.qt.io/qt-5/qtvirtualkeyboard-build.html#

Thanks.