product info banner

How can i add banner above each product info page? Or how can i disable the function that if i only have one product, it will go directly into the product page, to instead i would like to go to the product list first even i only got one product so i can display the banner on the top of the product

2. Admin - Configuration - Layout Settings - Skip 1-prod Categories

I don't understand exactly what you want to do with the banners.

In sub-categories, we can add banner through the edit category section. But for invidivual product page, can i add any banner above the product's name? And every product will have different banner, is that possible?

Or any other method can make one product show like the sub category page?