Add Symbol

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="512"
    height="512"
    viewBox="0 0 24 24"
>
    <linearGradient
        id="a"
        x1="3"
        x2="21"
        y1="12"
        y2="12"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#7f00ff" />
        <stop offset="1" stop-color="#e100ff" />
    </linearGradient>
    <linearGradient id="b" x1="8" x2="16" href="#a" />
    <g>
        <path
            fill="url(#a)"
            d="M12 3a9 9 0 1 0 9 9 9 9 0 0 0-9-9zm0 16a7 7 0 1 1 7-7 7 7 0 0 1-7 7z"
        />
        <path
            fill="url(#b)"
            d="M15 11h-2V9a1 1 0 0 0-2 0v2H9a1 1 0 0 0 0 2h2v2a1 1 0 0 0 2 0v-2h2a1 1 0 0 0 0-2z"
        />
    </g>
</svg>