wp-cpt-show_in_category_archive.php

/**
 * Show Custom Post Types in Category Archive Page
 * @link: https://wpbeaches.com/show-custom-post-types-category-archive-page/
 */
function themeprefix_show_cpt_archives( $query ) {
	if( is_front_page() || is_category() || is_tag() && empty( $query->query_vars['suppress_filters'] ) ) {
		$query->set( 'post_type', array(
			'post', 'nav_menu_item', 'custom-post-type-name'
		));
	return $query;
	}
}
add_filter( 'pre_get_posts', 'themeprefix_show_cpt_archives' );