@jsnell Since I set up the cheapest Home-compatible smart outlet I could find on Amazon (like $12?) to turn on whenever "last person leaves the house” and daisy-chaining that to the Aqara to auto-lock when it sees the switch turn on, it's been flawless about locking automagically when we've both left.
Also, pretty sure I was able to setup fingerprints just using the voice prompts from the lock itself (i.e., without having to install the app).