Electro - Mobile page category block order update

functions.php

add_filter( 'electro_home_mobile_v1_categories_block_args', function( $args ) {
    $meta = electro_get_home_mobile_v1_meta();

    if ( ! empty( $meta['hcb']['cat_slugs'] ) ) {
        $slug_order = array_map( 'trim', explode( ',', $meta['hcb']['cat_slugs'] ) );

        // Convert slugs to IDs so WordPress fetches only these categories
        $term_ids = array();
        foreach ( $slug_order as $slug ) {
            $term = get_term_by( 'slug', $slug, 'product_cat' );
            if ( $term && ! is_wp_error( $term ) ) {
                $term_ids[] = (int) $term->term_id;
            }
        }

        if ( ! empty( $term_ids ) ) {
            $args['category_args']['include'] = $term_ids;
            unset( $args['category_args']['slug'] );
        }

        // Sort the returned categories in the exact order of the entered slugs
        $sort_callback = function( $terms, $taxonomies ) use ( $slug_order, &$sort_callback ) {
            if ( is_array( $terms ) && ! empty( $terms ) ) {
                usort( $terms, function( $a, $b ) use ( $slug_order ) {
                    $pos_a = array_search( $a->slug, $slug_order );
                    $pos_b = array_search( $b->slug, $slug_order );

                    $pos_a = ( false === $pos_a ) ? 9999 : $pos_a;
                    $pos_b = ( false === $pos_b ) ? 9999 : $pos_b;

                    return $pos_a <=> $pos_b;
                } );
            }
            // Clean up filter so it only affects this specific block
            remove_filter( 'get_terms', $sort_callback, 10 );
            return $terms;
        };

        add_filter( 'get_terms', $sort_callback, 10, 2 );
    }

    return $args;
}, 20 );