Many of the major brands offer person recognition now, but it may require paying extra for their advanced features package since the actual evaluations are often done in the cloud. (Similar to the way voice assistants do major processing in the cloud.)
Nest and Netatmo both have this, for example. In the UK, the Hive View camera also has this feature.
However, having this feature in the camera’s own app does not mean you will be able to trigger smartthings events off of it. I’m not sure about the smartthings brand camera. For most of the other cameras, you will be dependent on Ifttt for integration of advanced features, And that may introduce a lag which is not acceptable.
If you have an android phone, you might be able to capture the notification from the camera’s app using a combination of Tasker and sharp tools. But it will depend on the specific brand/model of the camera.