They work as in HA should receive a webhook even when it gets triggered. Beyond that there is no (official) API to do anything else with them. What are you missing?
I would like to have the possibility to trigger the siren Netatmo by HA when a captor detects a movement for example. I have already made the supervision with Node Red and netatmo_event, but I can not trigger the siren with an automation. The webhook can just supervise the event state… but make an action, no.
Yes, we all would like to be able to trigger it, BUT there is no (officially documented) API for the siren to make it happen.