May be some steps can fix this issue. Follow the steps below
Open settings> Devices> Mouse and touchpad> Additional mouse settings> Mouse properties> Click the touchpad from list
Now see if the touchpad is disable, click on enable.
If it doesn’t work you uninstall the touchpad driver and install it again.
Source: [https://windowsclassroom.com/touchpad-not-working-windows-10/](link url)