We also thought it was silly that there wasn't a menu for the Reusable Blocks, so we added one:

add_action( 'admin_menu', function () {
if ( ( current_user_can( 'edit_posts' ) ) ) {
add_menu_page(
__( 'Reusable Content Blocks', 'domain' ),
'Reusable Blocks',
'edit_posts',
'edit.php?post_type=wp_block',
'',
'dashicons-controls-repeat',
21
);
}
} );