Why is my Touch ID not working after my battery replacement?

Please, contact the agency that changed the battery on your device.

Make sure that you have the latest version of iOS or iPadOS. Make sure that your fingers and the Touch ID sensor are clean and dry. ... Go to Settings > Touch ID & Passcode and make sure that iPhone Unlock or iTunes & App Store is on, and that you've enrolled one or more fingerprints. Try enrolling a different finger.

If Touch ID isn't working on your iPhone or iPad - Apple Support