This laptop has a trackpoint device and a touchpad with 3 buttons below the touchpad and 3 above.
Top/Upper buttons do not work with win10. They works in the bios so the hardware is good.
When I navigate to "Settings/Mouse/PointStick Settings" then everything is greyed:

OS Name: Microsoft Windows 10 Enterprise
OS Version: 10.0.19043 Build 19043
The driver is: ELAN PointStick Device Ver:32.2.3.5 Date: 2020. 04. 06.
From "system information/Components/Input/Pointing device":
Hardware Type USB Input Device / PNP Device ID USB\VID_1BCF&PID_0005\7&37CE0DBE&0&2
Hardware Type HID-compliant mouse / PNP Device ID HID\ELAN0720&COL01\5&A3706DD&0&0000
Hardware Type ELAN PointStick Device / PNP Device ID HID\ELAN0720&COL05\5&A3706DD&0&0004
Are there any other driver to test with?