I just installed two of these. How does netatmo sell them as homekit compatible when the siren is not available in the homekit?

I was hoping to use these sirens as part of a homekit security system because, well, the website says it’s homekit compatible – maybe there are a few lowercase letters on the website that say “no mermaid”, but this is defo deceptive.

Did anyone manage to sound the siren from the home app?