Hello Katomck,
I am Jaspreet Singh an independent advisor.
First of all get your trackpad device ID with these steps :
Search for mouse in the search bar and open mouse settings.
Click on additional mouse options on right hand side.
In the popup window that opens click on Hardware tab.
Click on Properties button.
Then select details tab.
click on dropdown and select "Device Instance path" from the list.
It will show you the value please note it down.
Next type in regedit in the search bar press enter and allow the access.
Go to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\HID\VID_???\VID_???\Device Parameters.
Replace ??? with your Device VID that you got from mouse settings.
You should get an entry saying "Flipflopwheel" it will be set to 0 double click it and set it to 1.
Save the edit and reboot your system your trackpad should now be inverted.
** Make sure only the pointing device you want to invert is connected as multiple device will have multiple VID in the mouse page and it can be confusing.