JSFiddle - React, Tailwind, and code Playground

HTML

<span class="deleted">Зачёркнуто</span>

CSS

span.deleted {
    color: gray;
    font-size: 30px;
    position: relative;
}

span.deleted::after {
    display: block;
    border-top: 5px solid red;
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    bottom: 0;
    content: " ";
}