We’re releasing a feature that allows you to publish different products and collections to each of your Hydrogen storefronts. This means if you have multiple Hydrogen storefronts, each one can have different products and collections available to it. Within the Shopify admin, where you previously saw “Hydrogen” as the name of the channel, you will now see the given name of each of your Hydrogen storefronts as a possible publishing destination. The same change applies in the Orders page and other areas of the admin experience. Each Hydrogen storefront is now treated as a unique channel.
This means for API calls where the publicationId for the Hydrogen sales channel app was passed in, now you should pass in the publicationId for the Hydrogen storefront channel. For example, if you previously used the publishablePublish mutation with the publicationId for the Hydrogen sales channel app, instead you will need to call this mutation with the publicationId for each Hydrogen storefront you wish to publish to.