JSFiddle - React, Tailwind, and code Playground

HTML

<div id="linha"></div>
<button type="button" onclick="adicionar()">Adicionar checkbox</button>

JavaScript

function adicionar() {
    document.getElementById('linha').innerHTML += "<input type='checkbox' name='itemName11' onclick='verificaChecks(\"11\")' id='item34' />";
}

function verificaChecks(nr) {
    alert(nr);
}