Fingerprint Not working and not showing

Looks like this thread might help you. They got your fingerprint reader working on Dell machines running Linux:
https://www.dell.com/community/XPS/XPS-13-9300-Does-fingerprint-reader-work-on-linux/td-p/7514958/highlight/true

And the Dell drivers (you'll have to search for yours):
http://dell.archive.canonical.com/pool/public/

Might be here?
http://dell.archive.canonical.com/pool/public/libf/libfprint-2-tod1-goodix/