But now that I've installed Zorin naively on this machine (a while back - I didn't think much of this then), I want to see if I can try to get the fingerprint sensor working with the help of you, the Zorin Forum.
Right. Well, this link was mentioned in the other thread, however, I mentioned that this option doesn't appear in the user settings for me, shown below.
You can also search this form about fingerprint as it has been brought up numerous times already and read through. I know there are several times that a step by step guide link as been posted.
But as @anon6471198 as also stated, this is not a Zorin/Ubuntu issue it is a manufacturer issue, contact them for the driver.
While fingerprint device support is available for many of the devices out today, have you done a search to ensure that your device is supported and possibly noted which kernel version added that support? Zorin is currently on the 5.15.4... kernel i believe. If this is a newer device, you will most likely have to upgrade your firmware version if not your kernel version (this is a risky operation, backup your files before attempting it. Warning: using a newer kernel prior to the release from the developers can break your OS installation. While it is possible to run without issue, it is different for every machine depending on the hardware configuration).
You may try lshw in the terminal. Look for fingerprint in the output. The device and driver should be listed. Search for that device in conjunction with Ubuntu 20 (on which Zorin is based). That should give you a better idea of its a driver issue or whether the device is supported yet or not.