To see the products that we are adding on the main page of Magento or any other page, we must go to Content -> Pages.
Here, we choose the page we want to modify, in this case we will modify the main one, so we go to the tab that says Select and Edit.
We go to the section, Content and within it in the editor we click on Insert Widget .
We choose the type of Widget to add, in this case it would be Product Catalog List.
Now we will see different things that we can configure in the plugin.
We can make it show the pagination or, in other words, show X products per page.
We indicate the maximum number of products to show.
We choose the default template from the ones available, by default one to show it in Grid or Grid view.
It can be customized to choose which products we want to show, according to the conditions we establish, if we do not indicate any, it will show all.
Finally, we insert the Widget, finish modifying the parameters of the page we want and save the page.
Now if we reload our page, the products will appear according to the criteria established to be shown, do not forget to clear the Magento cache in case the newly added products are not visible.