I have an Acer Aspire A515-55
Window 11 PRO Version 10.0.22000 Build 22000
I have the same problem with the fingerprint reader
I downloaded the driver for this laptop from Acer and installed it for a fresh install. This did nothing.
Then I followed your instructions and my credential manager was set to "manual". I changed it to "automatic" through a local account then went back to my MS account. I removed my old fingerprint from "Windows Hello" then put a new one in. When I closed the laptop and reopened it the fingerprint reader worked. When I rebooted it would not. It seems it isn't being saved for some reason.
We're investigating the issue. In the mean time, please feel free to add your issue to Feedback Hub. Appreciate your patience.
-Eddie