WP5.3で検証

Instagram

デフォルト表示

キャプション
<figure class="wp-block-embed-instagram wp-block-embed is-type-rich is-provider-instagram">
	<div class="wp-block-embed__wrapper">
		<iframe class="instagram-media instagram-media-rendered" id="instagram-embed-0" src="https://www.instagram.com/p/B3KylTIgx_b/embed/captioned/?cr=1&v=12&wp=1188&rd=https%3A%2F%2Fbe.wpqw.jp&rp=%2Fembed%2Finstagram%2F#%7B%22ci%22%3A0%2C%22os%22%3A1382.0000000000002%2C%22ls%22%3A856%2C%22le%22%3A856%7D" allowtransparency="true" allowfullscreen="true" frameborder="0" height="1066" data-instgrm-payload-id="instagram-media-payload-0" scrolling="no" style="max-width: 658px; width: calc(100% - 2px); background-color: white; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; border: 1px solid rgb(219, 219, 219); box-shadow: none; display: block; margin: 0px 0px 12px; min-width: 326px; padding: 0px;"></iframe>
		<script async="" src="//www.instagram.com/embed.js"></script>
	</div>
	<figcaption>キャプション</figcaption>
</figure>

ブロック設定パネル

スタイル設定

標準スタイル

ブロック制御コメント

<!-- wp:core-embed/instagram {"url":"https://www.instagram.com/p/B3KylTIgx_b/","type":"rich","providerNameSlug":"instagram","className":""} -->
<!-- /wp:core-embed/instagram -->