Display Featured post from diferent categories/subcategories in pages?

You can definitely do that.

You can actually see an example of doing a query in the FAQs sections of this plugin.

You’ll just need to query multiple taxonomies.

By default the post type spotlight has it’s own taxonomy “pts_feature_tax”.

There is a great example of taxonomy queries in the codex below

Taxonomy Queries

Below is an example snippet of querying posts within multiple taxonomy

$args = array(
	'post_type' => 'post',
	'tax_query' => array(
		'relation' => 'AND',
		array(
			'taxonomy' => 'category',
			'field'    => 'slug',
			'terms'    => array( 'awesome', 'sauce' ),
		),
                array(
                    ‘taxonomy’ => ‘pts_feature_tax’,
                    'field' => 'slug',
                    'terms' => array( 'featured' ),
                )
	),
);

$query = new WP_Query( $args );

Just note that you would want to pull in the correct taxonomy/term combo for your needs and also make sure you are querying against the correct post type.

Hope that helps!