Yes, there is. Change to Jason Bottjen’s (@JasonJoel’s) Component driver for the Smart Motion Switch/Dimmer, which splits the GE/Jasco Switch/Dimmer into two logically separate devices, namely, a Motion Sensor and a Switch/Dimmer. Very elegant, makes writing Rules very easy. And, they can be installed/updated using Hubitat Package Manager (“HPM”).
While I don’t use the motion sensor in Alexa, I tried it just now for you, and it correctly exposes the motion sensor as a motion sensor to Alexa. Make sure you are using the Component drivers. Here is one of our several using Jason Bottjen’s Component drivers for switches/dimmers: