Hello,
Thank you for getting in touch with us.
Your page actually does show 410 header:

Please refer to this article to se how the 410 URLs are expected to be: https://httpstatus.io/http-status-codes
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Perfect.
How can I get it to pull content from 410.php vs 404.php then?
Hello,
Thank you for following up, and sorry for the delay.
By default, the 410 Content Deleted redirects will use your theme’s page not found template (normally 404 page). If you wanted to use your custom 410 page, you can ask your theme developer for assistance. Some of the themes also offer a 410
page template that you can also use.
I hope that helps. Thank you, and please don’t hesitate to contact us if you need further assistance.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.