I haven’t personally used these specific devices but I use the older DSC06106-ZWUS by Aeon Labs and I have several Zigbee modules from both SmartThings and the Lowes Iris pocket outlets.
Some devices that are directly supported by SmartThings will be listed in the app, however there’s a lot out there that is compatible with SmartThings but not necessarily officially supported. Each device that is paired with SmartThings requires a Device Handler (DH) sometimes known as Device Type as well. I suggest you start out checking this FAQ. There’s a lot there and it can seem intimidating at first but just take it one step at a time. Take a look a the first two topics under “Getting Started”. It’s excellent primer on how to take advantage of ST flexibility.