As you can see here;
Elantech has a pretty long history of been a bit more figgity with GnuLinux than other manufacturers.
First thing every user should do after installing Zorin OS is run
sudo apt update && sudo apt upgrade
Can you please relay the terminal output of
xinput list
This is to check if Elan is listed.
If it is not, you might try:
sudo apt install xserver-xorg-input-synaptics
to see if the Synaptics Drivers recognize the device.
If still no good, you might add the Grub parameter psmouse.elantech_smbus=0
(Do not forget to run sudo update-grub after saving the file).
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