This code will collect all issues from a sprint based on its `aria-controls-name` attr.

getSprintIssues.js

function getSprintIssues (ariaControlsName) {
  if(!ariaControlsName) return
  const [header, _, content] = [
    ...document.querySelector(`[aria-controls="${ariaControlsName}"]`).children
  ]
  
  const sprintName = header.querySelector('[role="button"] > div:nth-child(2)').textContent
  console.log(sprintName)

  const items = [...content.querySelector('[role="rowgroup"]').children]
  items.forEach(item => {
    const textContent = item.querySelector('[data-test-id="software-backlog.card-list.card.card-contents.accessible-card-key"] a').textContent
    console.log(textContent)
  })
}
getSprintIssues('HEADER-DROP-12')