Best LED cans for low light output on Leviton dimmers

The first thing you could do is Try Core instead of the standard smart things features, as it will let you set a dim level of 1%.

I suspect smartthings uses the 10% in the official features because the GE dimmers, which are a very popular value brand, don’t handle low-level dimming very well. But the Leviton, particularly the universal, handle dimming in a different way and should be able to go lower.