var tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'))

var tooltipList = tooltipTriggerList.map(function(tooltipTriggerEl) {
  return new bootstrap.Tooltip(tooltipTriggerEl)
})

var popoverTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="popover"]'))

var popoverList = popoverTriggerList.map(function(popoverTriggerEl) {
  return new bootstrap.Popover(popoverTriggerEl)
})

var popover = new bootstrap.Popover(document.querySelector('.example-popover'), {
  container: 'body'
})

var popover = new bootstrap.Popover(document.querySelector('.popover-dismiss'), {
  trigger: 'focus'
})

<!-- Button -->
<button id="upcomingCancel1" class="btn btn-danger my-1" data-toggle="modal" data-target="#upcomingModal1">
    <i class="bi bi-x me-1"></i>Cancel
</button>

<!-- Modal-->
<div id="upcomingModal1" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="upcomingModalHeader1" aria-hidden="true">
  <div class="dialog-content" role="document">

    <div class="modal-header">
      <h5 class="modal-title" id="upcomingModalHeader1">Cancel delivery</h5>
      <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true"><i class="bi bi-x me-1"></i></span>
                    </button>
    </div>

    <div class="modal-body">
      Do you want to cancel?
    </div>

    <div class="modal-footer">
      <button type="button" class="btn btn-secondary" data-dismiss="modal">No
                    </button>
      <button type="button" class="btn btn-primary">Yes
                    </button>
    </div>

  </div>
</div>

<script type="text/javascript" src="//code.jquery.com/jquery-1.11.3.min.js"></script>

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-kQtW33rZJAHjgefvhyyzcGF3C5TFyBQBA13V1RKPf4uH+bwyzQxZ6CmMZHmNBEfJ" crossorigin="anonymous">
</script>
<script src="https://cdn.startbootstrap.com/sb-forms-latest.js"></script>