Replace Buy Now with Learn More on some product categories

functions.php.php

<?php
add_action( 'woocommerce_before_shop_loop', 'onn_modify_affiliates_category_buttons' );

function onn_modify_affiliates_category_buttons() {
	
	if ( is_product_category() ){
		
		global $wp_query;
		
		// Get current product category
		$cat = $wp_query->get_queried_object();
	
		// If this is the Affiliates category...
		if ( 'affiliates' == $cat->slug ) {
			
			// Remove add to cart button
			remove_action( 'woocommerce_after_shop_loop_item', 'woocommerce_template_loop_add_to_cart', 10 );
			
			// Extra step to remove add to cart button for Astra theme
			add_filter( 'astra_woo_shop_product_structure', function($shop_structure) {
				$new_shop_structure = array_diff( $shop_structure, array('add_cart') );
				return $new_shop_structure;
			});
			
			// Add the Learn More button
			add_action( 'woocommerce_after_shop_loop_item', function() {
				echo '<a href="' . get_permalink( get_the_ID() ) . '" class="button" aria-label="Learn More">Learn More</a>';
			});
			
		}

	}
	
}