Tim S.

Thanks for your question relating to Magento products and their visibility. So, depending on your settings, you may need to enable them and make them visible. There's a few variables here. First, do you have it set to show products that are out of stock and / or do you have inventory in the product. Is the simple product part of a parent product? Simple products that are represented by attributes like color and size need to be attached to a parent product. Also, Magento is cache heavy so you may need to clear the cache and re-index the website for them to show. If you provide an URL I'd be happy to take a look for you.

I hope this helps!

Tim S
Customer Community Manager