Kubuntu stylus pen mode for Panasonic touchpad problem

The Panasonic FZ-M1 offers an input mode by finger or stylus pen. Has anyone been able to activate the stylus mode on a Intel core m5-6y57 in Ubuntu?

I was able to use the stylus pen mode on FZ-M1 devices with processors m5-4302U or N2807. But had no luck with the model with this special m5-6y57 processor.

system

Operating System: Kubuntu 20.04
KDE Plasma Version: 5.18.8
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
Kernel Version: 5.15.0-56-generic
OS Type: 64-bit
Processors: 4 × Intel® Core™ m5-6Y57 CPU @ 1.10GHz
Memory: 7,7 GiB

xinput list

$ xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Sharp Corp.   07EA0004                    id=9    [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ USB FHD Webcam: USB FHD Webcam            id=10   [slave  keyboard (3)]
    ↳ USB2.0 Camera: USB2.0 Camera              id=11   [slave  keyboard (3)]
    ↳ Intel Virtual Buttons                     id=12   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=13   [slave  keyboard (3)]
    ↳ Panasonic Laptop Support                  id=14   [slave  keyboard (3)]

xinput-choices

$ xinput list-props 9
Device 'Sharp Corp.   07EA0004':
        Device Enabled (157):   1
        Coordinate Transformation Matrix (159): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000,
0.000000, 1.000000
        libinput Calibration Matrix (297):      1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000,
0.000000, 1.000000
        libinput Calibration Matrix Default (298):      1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.
000000, 0.000000, 1.000000
        libinput Send Events Modes Available (280):     1, 0
        libinput Send Events Mode Enabled (281):        0, 0
        libinput Send Events Mode Enabled Default (282):        0, 0
        Device Node (283):      "/dev/input/event8"
        Device Product ID (284):        1245, 38754

and

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 5986:0656 Acer, Inc  
Bus 001 Device 005: ID 13d3:5224 IMC Networks  
Bus 001 Device 004: ID 04dd:9762 Sharp Corp.  
Bus 001 Device 003: ID 0424:2514 Microchip Technology, Inc. (formerly SMSC) USB 2.0 Hub
Bus 001 Device 002: ID 8087:0a2b Intel Corp.  
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I've been trying to get the pen stylus to work for four weeks without success. There is no option in the Bios. The pen stylus is passive with a small tip.

Thank you for any help.