The shoe store is across from the bookstore. There are more people in front of the stores on the left than there are in front of the stores on the right. Is there a maintenance cart in front of the toy store that prevents people from getting inside? There is a decorated tree in front of the shoe store on the left. The same tree is in front of the bookstore on the right. But the stores are on the opposite sides of the aisle, on the outer edges of the aisle, so they are across from each other.

Across from each other.

If two shops are roughly the same size I would say they are opposite each other or facing each other. Across would not be my first choice for describing them. When you go from one to the other, you are walking across the aisle. In general, in the malls where I used to go before the pandemic, I would say that shops were on both sides of the aisle.

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