<div class="d-flex flex-row mb-3">
<div class="p-2 order-xxl-last bg-primary">Flex item 1</div>
<div class="p-2 bg-info">Flex item 2</div>
<div class="p-2 bg-info">Flex item 3</div>
</div>
You don't need to remember all CSS classes. Just use the Bootstrap Editor instead.