Keep in mind that apart from putting everything within reach of users, the best online stores make their interface catch them. And not only because of its simplicity, but because they take into account the following background details.
Responsive web design
Yes, if the portal adapts to all kinds of devices, it is more visited. Why? Because millions of people surf the internet every day from anywhere. So if the page opens on desktop, tablet, and mobile, it's more likely to increase sales.
Therefore, when creating it, add visible buttons, accessible menus and everything the user needs to complete their purchase. Besides, keep in mind that Google considers it vital to include it, in fact, it penalizes websites that lack it.