A photoresistor will probably work with the Aqara sensor so long as the resistance dips below 2K ohms (seems to me like that’s the spot). Trick is simply to find what threshold resistance the sensor accepts. If the photoresistor is (when not lit) infinite resistance (or some very high value) then it might work.
Not sure about battery consumption if the photoresistor has a non-infinite resistance when not lit.