First step is to use knx binding the correct way
Given GA 10/7/110 as the Group Address bound to the switch object and GA 10/7/113 as the Group Address bound to the state object, the line should be
You have to ensure that the R-Flag (L-Flag in Germany) is set for the state object, so that read requests are answered by the actuator.
When starting openHAB, it will request the state of 10/7/113 and set luc_test2.state accordingly. Whenever the state of 10/7/113 is changed or updated, the actuator should send the state and openHAB will receive this update.
I don’t know if the Alexa Skill is able to read item states though.