Alter WooCommerce Product Catalog visibility via hook. Based on this thread here: https://woocommercecommunity.slack.com/archives/C1KAZ91E3/p1601981478254000

pekky-catalog-snippet.php

<?php
/**
 * Change catalog visibility.
 *
 * No need to run ::save(), cause this hook is run before $product->save()
 *
 * Hooked to woocommerce_admin_process_product_object
 *
 * @param WC_Product $product The product object.
 */
function pekky_save_product_data( $product ) {
	$product->set_catalog_visibility( 'hidden' );
}
add_filter( 'woocommerce_admin_process_product_object', 'pekky_save_product_data' );

got it working thanks to this, thank you! (couldn't edit visibility on product status change any other way, changes to visibility never got persisted)
im using it like this:

add_action("<newstatus>_product", "on_product_<newstatus>", 10, 2);
function on_product_<newstatus>($id, $post){
	$product = wc_get_product($id);
	add_post_meta( $id, "my_visibility", "hidden", true);
}
add_filter( 'woocommerce_admin_process_product_object', 'pekky_save_product_data' );
function pekky_save_product_data( $product ) {
	$id = $product->get_id();
	$visib = get_post_meta($id, "my_visibility", true);
	if($visib != null){
		$product->set_catalog_visibility($visib);
		delete_post_meta($id, "my_visibility");
	}
}

Glad it worked! 🚀
Don't forget to have a nice day and try out pancakes 💪🏼🥞
Over and out! 🏄🏽‍♂️