<font-awesome-icon icon="fa-brands fa-autoprefixer" />
<FontAwesomeIcon icon="fa-brands fa-autoprefixer" />
.my-icon::before {
font: var(--fa-font-brands);
content: "\f41c";
}
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 640 512" style="width: 30px;height: 30px;fill: black">
<path d="M318.4 16l-161 480h77.5l25.4-81.4h119.5L405 496h77.5L318.4 16zm-40.3 341.9l41.2-130.4h1.5l40.9 130.4h-83.6zM640 405l-10-31.4L462.1 358l19.4 56.5L640 405zm-462.1-47L10 373.7 0 405l158.5 9.4 19.4-56.4z"/>
</svg>
<i class="fa-brands fa-autoprefixer"></i>