Post List components query can be customized using the wpak_posts_list_query_args filter hook.
Internally, WP-AppKit Post List components’ queries are WP_Query objects. So basically, all customization that can be done on WP_Query objects can be done on Post List components. See https://codex.wordpress.org/Class_Reference/WP_Query to have an overview of all the taxonomies / meta ordering / filtering possibilities that you can apply to Post List components using the wpak_posts_list_query_args filter.
Some examples:
