Order ../products/stock.php by date DESC instead of id And mutiple product with the same name

[HyperXnl]

Hi, for the past two days I've been figuring out how to sort the stock.php by date as DESC instead of ID. But I just can't figure it out.
Where can I set it so that it will sort by date DESC.

And is there also a possibility to create multiple articles with the same name?

What I now see is that he checks if the name exists, if the name exists then the article is not created.

Thanks