I wonder if one of the Italian organized crime group like the Cosa Nostra, Camorra, Ndrangheta, SCU or Stidda use tattoos like other organized crime groups? And does those tattoos have meaning?

I know Stidda use 5 dots or a Star on there hands. And in 2020, I’m sure that most of the new members of those crime groups have tattoos.
In Peaky Blinders, the character of Luca Changretta has many tattoos on his body, crosses and a black hand. So I was wondering do some italians group have tattoo meaning ?