Javascript - checkbox reading value from array of objects

I need to get my checkboxes in todo list read from object in array if task is complete or not. And stay checked when they're complete and unchecked or not.

const todos = [
  {
    id: 1,
    title: 'Nakupit',
    description: 'Mlieko, syr, vajcia',
    completed: false,
  },
  {
    id: 2,
    title: 'Umyt auto',
    description: '+ povysavat',
    completed: true,
  },
]

This is the array and i tried on checkbox something like this. And variations, unable to get it work and changing array or value from array making checkbox ,checked, if complete

 toDoCheckbox.addEventListener('click', () => {
      if (toDoCheckbox.checked = true) {
       return todos.completed === true
        
      } else {
       return todos.completed === false
      }
    });

Can anyone help with it?