The GE switches have an illuminance sensor but it isn’t exposed to ST:
https://www.amazon.com/GE-Occupancy-Required-SmartThings-26933/dp/B071Y38FX5
If you don’t care about tying it into your ST network, you can spend less and configure a dumb motion switch for vacancy.
https://www.homedepot.com/p/Leviton-180-Degree-Pir-Incandescent-CFL-LED-Occupancy-Detector-White-R02-IPS02-1LW/203826482