Convert your WooCommerce in catalog mode

convert_wc_in_catalog_mode.php

<?php
/**
 * Convert your Ecommerce in catalog mode
 * @package LetsGodev\MuPlugins
 * @since 1.0
 */

// Hide the cart page & checkout page
add_action( 'template_redirect', 'hideCartCheckoutPage' );

// All products must not be available for sale
add_filter( 'woocommerce_is_purchasable', '__return_false' );

// Remove add-to-cart buttom from variations
add_action( 'woocommerce_before_add_to_cart_form', 'removeVariationAddToCartButton' );

// add Contact Us button
add_action( 'woocommerce_single_variation', 'addContactUsButton', 20 );
add_action( 'woocommerce_simple_add_to_cart', 'addContactUsButton', 30 );

// Optional: hide minicart on StoreFront
add_action( 'wp_head', 'hideMiniCart' );


/**
 * Hide the cart page & checkout page
 * @return void
 */
function hideCartCheckoutPage(): void {
	if ( is_cart() || is_checkout() ) {
		wp_redirect( get_permalink( wc_get_page_id( 'shop' ) ) );
		exit;
	}
}

/**
 * Remove the call to the template
 * @return void
 */
function removeVariationAddToCartButton(): void {
	remove_action( 'woocommerce_single_variation', 'woocommerce_single_variation_add_to_cart_button', 20 );
}

/**
 * Contact Us Button
 * @return void
 */
function addContactUsButton(): void {
	
	$link = 'https://wa.link/zrgr7r';
	
	echo '<div class="woocommerce-variation-add-to-cart variations_button">';
	echo '<a href="'.$link.'" class="button add_to_cart_button wp-block-button__link wp-element-button wc-block-components-product-button__button has-text-align-center">ContactUs</a>';
	echo '</div>';
}


/**
 * Optional : Remove minicart front StoreFront theme
 * @return void
 */
function hideMiniCart(): void {
	echo '<style>';
	echo '.site-header-cart { display: none; }';
	echo '</style>';
}