The products uploaded to your default store will automatically be uploaded to the additional stores.
Therefore, you do not need to upload your products again to each store you add.
To check if the products uploaded to your default store are also uploaded to your additional stores, access the admin page of the store you wish to check, then go to [Products > Products > Product list] in the admin page.
You will find a column called [Product name (store name)], which is not visible on your default store.
Select this column header in [Settings] at the top right of the table to check which products have been uploaded to the relevant store.
Click the product name to access the product's settings.
You can set them differently for each store.
For example, you can name the same product differently in each store.
You can modify the information of fields marked with a storefront icon according to the store you are currently managing.
You can set this information differently according to each store.
If there is no icon and you cannot change the setting.
This means that the setting is equally applied to all your stores.
For example, the production or release dates are common to all stores under your Cafe24 username.
To expand internationally, you need to readjust country-specific information such as domains, payment methods, and shipping methods.
Go to guidelines on domains
Go to guidelines on payments
Go to guidelines on shipping
This information can be set up in the same way as you did for your default store.