I received a response from Lutron support that Samsung is responsible for the development of the smartthings integration, so they don’t know if or when devices like the fan switch (introduced in 2018), the motion sensor (introduced in 2019) or the new outdoor plug will be added to that integration.
Thanks for this update. I wish ST would move on this - tighter integration for Caseta would be a big win for the ST platform. I realize Caseta’s not as popular as Hue, but I think it’s growing (especially these days with home-bound people looking for improvement projects).