JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
    <div class="inner_1">
        <p>This is inner_1. Some Content goes here</p>
    </div>
    <div class="inner_2">
        <p>This should be red if it is <b>below</b> inner_1</p>
    </div>
    
     <div class="inner_2">
        <p>This is inner_1. Some Content goes here</p>
    </div>
    <div class="inner_1">
        <p>This should be red if it is <b>below</b> inner_1</p>
    </div>
</div>

CSS

.inner_1 + .inner_2 p {
    border: solid red 1px;
}