As a follow-up, I eventually got it to work. I logged into the API control panel and added/edited a device type.
First, I tried the Z-Wave Lock and the Lock Capability device types that are included. Then I tried the one from michmerr (see this thread Yale touchscreen lock device type, and initial dev experience). None of those worked for me. Finally, I added the one from yracine (see this thread: Yale locks - Remotely change codes?). This one worked for me.
I’m new to the whole SmartThings world, so I haven’t dug into the code yet to determine what’s different between the two, but I will soon. But if anyone else gets the Yale lock and gets the status events but can’t control it, try these different device types.