add-embed-style-to-my-snow-monkey.php

<?php
/**
 * ブロックエディタのoEmbedへcss追加
 * wp-content/themes/snow-monkey/vendor/inc2734/wp-oembed-blog-card/src/App/View/View.php
 * apply_filters( 'inc2734_wp_oembed_blog_card_block_editor_template', $template, $url );
 */
add_filter(
	'inc2734_wp_oembed_blog_card_block_editor_template',
	function ( $template, $url ) {
		$template .= sprintf(
			'<link rel="stylesheet" href="%1$s?ver=%2$s">',
			esc_url_raw( MY_SNOW_MONKEY_URL . '/embed/embed-min.css' ),
			filemtime( MY_SNOW_MONKEY_PATH . '/embed/embed-min.css' )
		);
		return $template;
	},
	11,
	2
);