With the introduction of site collection app catalogs, tenant administrators can enable app catalog on the specific sites. Once enabled, site collection administrators can deploy SharePoint add-ins and SharePoint Framework solutions that will be available only in that particular site collection.

To create a site with an app catalog, you need to execute two commands.

First, spo site add to create the site, followed by spo site appcatalog add to add the app catalog to the site you just created.

We should extend the spo site add command with a new option, --withAppCatalog to streamline this process.