I also have Smarthings Hub and the “security camera” products are integrated (i.e., Ring Doorbell 2 and Floodlight Cam); however, the sensors tied to the Ring Security are not integrated. I wish they were; however, in the interim I do have Echo devices and use the Smarthings integration with Alexa to bring these together. The problem has been that SmartThings allows multiple locations and the Alexa Skills app for Smarthings only allows connection to a single Smarthings Hub. I have done numerous “workarounds” trying to get things to work and it has necessitated setting up a separate Amazon Alexa account at our vacation home and using an old phone no longer “activated” as a “remote” to set everything up and operate the apps.
Hopefully, in the future Amazon will realize there is a need to control multiple locations!