It does, unless you configure always_callback: true (for sensors at least, not sure for binary sensors). But then it still only triggers on GroupValueWrite (See link above). Most Knx actuator can be set to send their value periodically, so this should be a fine workaround (and also reduce bus load as there is no need for the read telegram).
Drawback of your solution is that these state (attribute) changes are not only stored in influx, but also in HAs database. (Same for always_callback).