pe-se, Click here and input your system service tag and update the system bios. Update January 5, 2022 = After completing troubleshooting, a DELL-Cares agent setup service which resolved the issue.
Hi! My fingerprint sensor is also not found anymore. A dell technician came and changed my touchpad because of another error, which means he changed the entire mainboard. It did not solve the initial problem (which is a design flaw, but that is another topic) but after the change the fingerprint sensor did not work anymore. He then changed it back to the old mainboard but the problem persisted.   The sensor is not found in the devices manager and my dell software does not find any problem (or scanner) whatsoever. Before the change, it worked like a champ. I have an XPS 9310 i7-1195.
XPS 9310, fingerprint sensor issue