wc-attr-img-shop-page.php

<?php

// Add attribute images on shop page with products
function display_attribute_images() {
	global $product;

	$attributes = $product->get_attributes();
	echo '<div class="attribute-image-wrapper" style="display:flex;flex-direction:row;justify-content:center;">';
	foreach ( $attributes as $attribute ) {
		$name = $attribute['name'];
		$options = $attribute['options'];

		foreach ( $options as $option ) {
			$image = wp_get_attachment_image( get_term_meta( $option, 'ux_image', true ), 'thumbnail' );

			if ( $image ) {
				echo '<div class="attribute-image" style="width:50px;margin-right:5px;">' . $image . '</div>';
			}
		}
	}
	echo '</div>';
}
add_action( 'woocommerce_before_shop_loop_item_title', 'display_attribute_images', 20 );