<p><span>Hello</span>, how are you?</p>
<p>Me? I'm <span>good</span>.</p>
{
const ex = $('p').find('span')
console.log(ex)
}
{
const ex = Array.from(document.querySelectorAll('p'), element => {
return Array.from(element.querySelectorAll('span'))
}).flat()
console.log(ex)
}