https://docs.magento.com/m2/ce/user_guide/catalog/catalog-price-scope.html

The scope of the base currency that is used for product prices can be configured to apply at either the global or website level. If applied at the global level, the same price is used throughout the store hierarchy. If the price configuration is set to the website level, the same product can be available at different prices in different stores. By default, the scope of product pricing is global.

Different factors can affect the price of the same product in one location and not another. For example, there might be additional costs to bring the product to market, and other considerations that impact the price of products sold in a specific store. The following illustration shows a multisite installation with the base currency set to the website level. In each store, the same product has a different price.

To configure price scope:

1.

On the Admin menu, tap Stores. Then under Settings, choose Configuration.

2.

In the panel on the left under Catalog, choose Catalog.

3.

Scroll down to the Price section. Then, set Catalog Price Scope to one of the following:

• Global
• Website

The scope setting that you choose appears below price fields in your catalog.

4.

When complete, tap Save Config.