If you have either of these GE/Jasco motion-dimmers
GE Motion Switch (26931) and Motion Dimmer (26933)
MichaelS has the DTH that supports those and it works with Smart Lighting just not If…Then automations.
Of course, at some point in the future if ST doesn’t do a native integration, support will go away
https://community.smartthings.com/t/release-ge-motion-switch-26931-and-motion-dimmer-26933/