JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script>
<table>
    <tbody>
       <tr>
           <td><font>Sku_ID</font></td>
           <td><font>1</font></td>
           <td><font>not me</font></td>
       </tr>
       <tr>
           <td><font>not me</font></td>
           <td><font>Sku_ID</font></td>
           <td><font>2</font></td>
           <td><font>not me</font></td>
           <td><font>not me</font></td>
           <td><font>not me</font></td>
           <td><font>not me</font></td>
       </tr>
       <tr>
           <td><font>Sku_ID</font></td>
           <td><font>3</font></td>
           <td><font>not me</font></td>
       </tr>
       <tr>
           <td><font>Sku_ID</font></td>
           <td><font>4</font></td>
           <td><font>not me</font></td>
       </tr>
       <tr>
           <td><font>Sku_ID</font></td>
           <td><font>5</font></td>
           <td><font>not me</font></td>
       </tr>
    </tbody>
</table>

JavaScript

const fonts = document.querySelectorAll('font');
const length = fonts.length;
let ids = [];

for (let i=0; i<length; i++) {
  if (fonts[i].innerText === 'Sku_ID') {
    ids.push(fonts[i+1].innerText)
  }
}

console.log(ids);