I know Apple's Neural Engine is used to power Face ID and the facial recognition stuff in Photos, among other things.
Sure, just post the source code and I'll point out where it does so, I somehow misplaced my copy. /s
The core problem here is trust, and over the last several years Microsoft has burned a hell of a lot of theirs with power-users of Windows. Even their most strident public promises of Recall being "opt-in" and "on-device only" will--paradoxically--only be kept as long as enough people remain suspicious.
Glance away and MS go back to their old games, pushing a mandatory "security update" which reset or entirely-removes your privacy settings and adding new "telemetry" streams which you cannot inspect.