I have a Pixel 7 that runs GrapheneOS and don’t have any of the fingerprint scanner issues you described. I don’t even understand how using it in the dark could make a difference since a circular portion of the screen under your finger lights up at maximum brightness when it is scanning your fingerprint. The only issue that I have is that sometimes a piece of dead skin peels off of my thumb or I wore a glove in the heat making my skin a little pruney which makes the scanner unable to read my fingerprint right. But that was a problem with my old Moto phone as well.
Edit: After making some research it appears that Google fixed the fingerprint scanner issue with a software update.
I have a Pixel 7 that runs GrapheneOS and don’t have any of the fingerprint scanner issues you described. I don’t even understand how using it in the dark could make a difference since a circular portion of the screen under your finger lights up at maximum brightness when it is scanning your fingerprint. The only issue that I have is that sometimes a piece of dead skin peels off of my thumb or I wore a glove in the heat making my skin a little pruney which makes the scanner unable to read my fingerprint right. But that was a problem with my old Moto phone as well.
Edit: After making some research it appears that Google fixed the fingerprint scanner issue with a software update.