How to add Icon as marker on svg map / React.js

I simply want to add custom icon on a city .

I use react turkey map svg as api and I can just catch the city data element .

How can I add a marker on this city element ?

API link -> API

    const onMapHover = (data) => {
     if (data.id === "istanbul") {
     const element = document.getElementById(data.id);  
  }
};