JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
            <li class="white"><span class="one">Арсенал</span> <span class="two">100</span></li>
            <li class="blue"><span class="one">Мечта</span> <span class="two">200</span></li>
            <li class="red"><span class="one">Сибирь</span> <span class="two">300</span></li>
        </ul>

JavaScript

const result = [...document.querySelectorAll('ul > li')]
  .map(el => [el.querySelector('.one').innerText, el.querySelector('.two').innerText])
  .reduce((acc, [key, val]) => ({ ...acc, [key]: val }), {});

console.log(result)