Which commit fixed Samsung's fingerprint?

[ShaDisNX255]

I apologize if I'm asking this in the wrong section, or if I'm not supposed to ask lol I'm a bit new to this.

I wanted to ask if someone would be kind enough to point me to the commit that fixed the fingerprint reader on phh's builds
I tried looking around but really didn't find anything. I know it was included in the changelog for AOSP 10.0 release v217 (https://github.com/phhusson/treble_experimentations/releases/tag/v217) where it states that there is a fix for Samsung's under-display optical reader for phones like Galaxy A51...etc...

The reason I ask is because there is a stable aosp ROM for a Samsung device based on phh's earlier work which doesn't include this fix. There doesn't seem to be any plans of updating it anytime soon. I wanted to look around and see if maybe I could fix this myself if possible.

Any help or pointers would be greatly appreciated!