Default must be set on yes
Then run the command
pam-auth-update --enable fprintd
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Ran that command as a user and failed, as sudo and contents of the fprint file still show Default: No
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If you use root ? sudo -i ?
File still shows Default: No
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You have to edit it manually
And run
pam-auth-update --enable fprintd
I forgot the d in the command 
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Okay, and what next? I don't see any place to register fingerprints.
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So in short for @jpgalvao
sudo -i
gedit /usr/share/pam-configs/fprintd
Default: No must set to Yes
Save the file
pam-auth-update --enable fprintd
Reboot and lets hope it works
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$ sudo apt install fprintd libpam-fprintd
fprintd-enroll -f right-middle-finger
enrolled a finger. For example:
$ fprintd-enroll -f right-middle-finger
Enrolling right-middle-finger finger.
Enroll result: enroll-stage-passed
Enroll result: enroll-stage-passed
Enroll result: enroll-stage-passed
Enroll result: enroll-stage-passed
Enroll result: enroll-stage-passed
Enroll result: enroll-stage-passed
Enroll result: enroll-stage-passed
Enroll result: enroll-completed
$ # then verify
$ fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
- #0: right-middle-finger
- #1: right-index-finger
Verify started!
Verifying: right-middle-finger
Verify result: verify-match (done)
All good. Now all that was needed was to add the fingerprint requirement to the authentication system, PAM. This is usually done by editing files in /etc/pam.d/ (there is one file per authentication context: login, sudo, gdm, polkit-1, etc), but I discovered that on Debian it could also be managed by pam_auth-update, a small utility that can fill the PAM configuration according to profiles defined in /usr/share/pam-configs/. Conveniently, Debian provides /usr/share/pam-configs/fprintd, which allows to enable fingerprint authentication everywhere, cleanly.
$ sudo pam-auth-update --enable fprintd
And that’s it!
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joao@joao-Inspiron-5406-2n1:~$ fprintd-enroll -f right-middle-finger
Impossible to enroll: GDBus.Error:net.reactivated.Fprint.Error.NoSuchDevice: No devices available
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Try
$ sudo apt install fprintd libpam-fprintd
And try the steps again from my last post.
It was already installed 
I also tried this but it didn't work drivers - How do I get the fingerprint reader to work in Ubuntu 21.04? (XPS 15) - Ask Ubuntu
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The only thing you can try now is
wget -O ~/Downloads http://dell.archive.canonical.com/updates/pool/public/libf/libfprint-2-tod1-goodix/libfprint-2-tod1-goodix_0.0.6-0ubuntu1~somerville1_amd64.deb
sudo dpkg -i libfprint-2-tod1-goodix_0.0.6-0ubuntu1~somerville1_amd64.deb
Reboot
fprintd-enroll
I just don't think these Dell fingerprint readers will work Zorin.
Impossible to enroll: GDBus.Error:net.reactivated.Fprint.Error.NoSuchDevice: No devices available
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Starting with 21.10, you may not need to do this anymore as Linux kernel 5.12 and newer will support the device out of the box.
Sorry, it didn't work 
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I am sorry for having no working solution...
The only solution is to try a live linux distro that has kernel 5.12 and up.
Manjaro, Ubuntu 21.10, Pop! OS 21.10
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Downloaded package, installed missing dependencies and then installed download.
ran fprintd-enroll
Impossible to enroll: GDBus.Error:net.reactivated.Fprint.Error.NoSuchDevice: No devices available
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According to that page the fingerprint needs a firmware upgrade, i dont know if this can be done on Zorin.
No problem, I'm glad you tried your best to solve my problem.
I love Zorin, so I'll get to live without the fingerprint sensor 
Thank you very much for trying, i hope one day someone fixes it
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