.section #location{
    position: relative;
}
.section #location::after{
    content: '';
    display: inline-block;
    position: absolute;
    background-image:url('#{$svgPath}pin.svg') ;
    width: 16px;
    height: 20px;
    top: 50%;  /* Установка позиции */
    left: 10px;
    background-size: contain;
    background-repeat: no-repeat;
}

<div class="section">
  <input type="text" name="location" id="location" placeholder="United State">
  <button type="button" class="search-button">🔍</button>
</div>