JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
    <li>4</li>
    <li>5</li>
    <li>6</li>
    <li>7</li>
</ul>

CSS

ul {
       display: grid;
       grid-template-columns: repeat(auto-fit, minmax(210px, max-content));
       grid-gap: 16px;
       padding: initial;
       justify-content: center;
}

li {
    list-style-type: none;
    border: 1px solid gray;
    padding: 5px;
    width: 210px;
}