Custom query help!

[joelinit1]

Hey all! I'm looking for help with a custom query and am a bit stumped! I have a registration form whereby users can effectively choose posts they'd like to see - the post IDs are then saved to their profile as a custom field called breakout_choices . My query works if they only select one post, but returns nothing if they select multiple. Any ideas?!?!

add_action( 'elementor/query/breakout_choices', function( $query ) {
$user_id = get_current_user_id();
$meta = get_user_meta( $user_id, 'breakout_choices', true );
$query->set( 'page_id', $meta );
} );