Typically, Google releases one update per month to the Pixel 6 and Pixel 6 Pro. However, this month it has released two, with the second containing no changelog. Strangely, Google left it to Verizon to confirm what changes SD1A.210817.037 makes, which is available to both devices globally.
https://www.notebookcheck.net/Google-has-fixed-the-Pixel-6-and-Pixel-6-Pro-s-fingerprint-sensor-issues-with-a-surprising-update.579953.0.html