Site Collection App Catalogs are great for special cases (like developing apps or site unique apps), but using them on scale would be a mess.

I got a question: Why should we use the Tenant App Catalog at all when we could enable a Site Collection App Catalog on every teamsite? So the suggestion here is to install SharePoint Framework Packages on many Site Collection App Catalogs, instead of the Tenant App Catalog. In that way those wouldn’t be visible for all users in the “Add an app” page.

Site Collection App Catalogs (SCAC) are much appreciated, thank you, Office 365 Team. Here is a couple of tips and tricks for SCAC.

Tip #1 You don’t need Tenant Admin rights to add a new Site Collection App Catalog

I have seen many blogs, forum threads etc that state that only Global Tenant Administrators can add new Site Collection App Catalogs. The truth is that a SharePoint Admin rights are enough. The trick is to make that SharePoint Admin Account to a site collection administrator of the app catalog site. To be precise the account that adds a new SCAC must have Manage Web Permissions, as stated in error message: