If you use the hue button with the Hue bridge, then it is invisible to smartthings. You could have it turn on a particular light and then have that light coming on trigger the siren if that works for you.
The button is a Zigbee device and you can use it by connecting it directly to a smartthings hub with the DTH discussed in the following thread. Then it works like any other Zigbee button connected to smart things, but you won’t get any special hue features from it and it won’t show up in the hue app.
So basically one or the other, but not both.