Some users on Reddit state that disabling the animation makes the scanner work more quickly, but it seems to just be a new cosmetic option. Among issues like slow autofocusing, the S20 series has been criticized for featuring an ultra-sonic in-display fingerprint sensor that is slower than competing smartphones’ scanners.
The update, ‘G98xxXXU2ATE6,’ also features Samsung’s May 2020 security patch. To check if the update is available, select ‘Settings,’ then ‘Software Update’ and finally, ‘Download and Install.’
Source: XDA Developers