Dear William Thompson,
Good day!!
Apologies for the inconvenience caused and please don’t worry, let’s work together on your concern and move towards a resolution path.
I understand your concern and since you mentioned you are able to see the columns when you click on the +New in the List of Microsoft Lists, I would like to suggest you follow the below steps and see whether you are able to see the columns which you want to delete:
Open the List in the Microsoft Lists> Settings> List Settings> Scroll down to the columns and see whether you are able to see the column you want to delete> If yes, click on the Column> Click on the Delete button to remove from the List.
However, if you want to delete the complete List, please follow the below steps:
Open the List in the Microsoft Lists> Settings> List Settings> Delete this List:
If there is any misunderstanding from our end, we apologize and request you to share the more details with some screenshots for better understanding and guide you further.
Appreciate your patience and understanding. Have a great day!!
Best Regards,
Sophia