Before 2021.8 version installed - had Z-Wave Neo Coolcam siren in system.
Siren integration claims “Siren entities are created automatically by integrations that support them.”.
But still have no entities created. Do I need remove and add device again to HA ?
First, you must be using the zwave_js integration for Z-Wave siren support, legacy zwave or ozw integrations do not support sirens. Second, only Z-Wave Sirens that implement the Sound Switch Command Class are supported. The Neo Coolcam siren (NAS-AB01Z) does not support this command class, so you will not get any siren entities for it. Devices like the Aeotec Gen 6 Siren and Zooz ZSE19 are examples of supported Z-Wave sirens.
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Thank You very much.
Have right integration (Z-Wave JS), but “wrong” siren.
Would be nice to have more information about supported devices in Siren integration documentation.
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My zigbee siren doesn’t appear either 
For future folks, you can easily change the sound of the
NAS-AB01Z with a basic zwave set configuration parameter service before you trigger the alarm
For example, to make the sound a doorbell
service: zwave_js.set_config_parameter
data:
parameter: "5"
value: "1"
target:
entity_id: switch.garage_alarm
Full list of parameters here:
https://devices.zwave-js.io/?jumpTo=0x0258:0x0003:0x0088:0.0
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