Dear,
Good day!
For your question "Which we requested be removed over a year ago by the way". Yes, the Microsoft list content view not displaying properly since you have delete it more than one year. So you can't see it now as it's normal behavior.
In this situation, I suggest you add your valuable idea in the Microsoft Feedback which is the best place to improve the Microsoft products. The link is as below: SharePoint · Community (microsoft.com)
Thanks for your cooperation.
Best regards,
Sophia