JSFiddle - React, Tailwind, and code Playground

HTML

<div id="DivForHoverItem">
    <div id="HiddenText"><p>Hidden text</p></div>
</div>

CSS

#DivForHoverItem {
    /*just so we can see it*/
    height: 50px;
    width: 300px;
    background-color: red;
}

#HiddenText {
    display: none;
}

#DivForHoverItem:hover #HiddenText {
    display:block;
}