Volvo C30 alarm

I have had a Volvo C30 for a month or so and I have realized that the alarm does not work, I also have another Volvo C30 at home and paying attention to it it does not work either and in another one that I see on the street the warning light is not active either, I don't give it much importance but it is strange. In another 2018 Volvo V40 that I have, the alarm seems the same and it works.