Hi,
So I have a 2019 MacBook Pro. These models have a T2 security on it and it needs reset.
The Apple T2 Security Chip is Apple's second-generation, custom silicon for Mac. The T2 chip delivers capabilities to your Mac, such as encrypted storage and secure bootcapabilities, enhanced image signal processing, and security for Touch ID data. Learn more about hardware security in Apple devices.
The link below walks you through how to reset the T2 chip and once you reset it - you can update your Touch ID :)
reset the SMC
once I followed this- I was able to reset my Touch ID and it works now for everything!
Hope this helps! I just figured it out.