How can I fix the 'out of stock' issue on my products?

[Alexander24]

Hello

I set the values ​​for the number of products manually + checked the “sell when out of stock” checkbox. However, the website shows that the item is out of stock. How to solve this problem?/

And help with one more problem at the very bottom of the site, another product page with a full-width photo has come out, how can I remove it?

[Alexander24]

If you select “Out of stock” text, then in the background there is an inscription “Item added to cart”