Split product ads up into different ad groups retrospectively

I currently have a manual campaign and an auto campaign. In the manual campaign, all of my products are split into different ad groups, but in my auto campaign, they are all just in one ad group.

I shouldn’t have done this as my products are different and I can’t adjust the bidding/targeting now for each product.

In there a way to split the products up in the auto campaign into different ad groups?

I don’t want to have to create new ad groups manually and lose all of the historical data as it is been running for a long time. I fear it would be like starting the product ads from scratch if I did this so Amazon wouldn’t use the history/data it has on the product.

Thanks