Reverse Custom Attributes Dropdown Order

I understand I can manually edit the attributes order from the backend, however, I have hundreds of products so I’m looking for an automatic solution to add to my functions.php. I believe the dropdown menu is currently ordering the attributes in alphabetical order, so I simply need to reverse the order to achieve this goal. Another solution would be running something to update the Default Form Value for every product but that approach is most likely very tricky.

P.S. I’ve attached a screenshot.

Thanks!

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