However, you can use virtual switches, just as you can with echo. So you can have a routine that unlocks a lock, have a virtual switch that runs that routine, and tell Google Home to turn on that virtual switch.
Alternatively, you could use IFTTT with Google home. To be honest, I don’t know if it will let you access a lock directly through the SmartThings service/channel (let us know if you try it and it does) but you could do the same thing to have it turn on the virtual switch. That would give you more flexibility in naming.