You can create a virtual lock using the vEdge Creator Edge driver and then use the Kwikset Smart Home Alexa skill to mirror the status of the lock from Alexa to ST using Alexa routines. You may also be able to do something similar with the IFTTT mobile app.
Edit: I neglected to mention that I do something similar with my Schlage Wi-fi locks. The one gotcha is that if you want to unlock a lock via an Alexa routine, you need to use an Alexa custom action to mimic doing a voice unlock (which you have to enable in the settings for the real lock). So, for example, if you use ST to unlock the virtual lock, your Alexa routine will be “If virtual lock unlocks then Alexa custom ‘unlock mylock using pin code xxxx’” which is a pin code you create when enabled voice unlocking.