Remote Data Blocks do not work in site editor

[chriszarate]

Most flows involve editing a post or page directly (edit.php). But it is also possible to edit a page via the Site Editor (site-editor.php).

To replicate, navigate to Appearance > Editor > Pages > Edit, then add a remote data block that requires choosing from a list (e.g., "Conference Event"). You will see a perpetual loading state, because there are no patterns available to render the data.

In the site editor context, loading patterns by block type (wp.data.select('core/block-editor').getPatternsByBlockTypes( /* block type */ )) always returns an empty set. We are therefore unable to load the block's "default" pattern. We rely on the default pattern to display the remote data.