I don’t really understand what you want to do;

Let me put it this way:

You can edit the title, details, pictures, prices, etc. of Amazon backend products by clicking on the edit button;

If you don’t want to sell FBM (self-delivered products), just change the inventory to zero. If you are sure that you will not sell the products anymore, you can choose to delete the listing;

Another way is to merge variants. This requires a table to operate. It means that similar products are merged into one main link. You should learn how to operate products with a table first;