Fumiki Takahashi

TAROSKY INC.

Add iframe block for block editor. 
WordPress editor sometimes cleans up <code>iframe</code> tag if the user is a contributor(single site) or an editor(multi site) who has no capability <a href="https://wordpress.org/support/article/roles-and-capabilities/#unfiltered_html" rel="ugc">unfiltered_html</a>.
This plugin simply add 1 custom block iframe block. That’s all and no config.
<h4>Features</h4>
<ul>
<li><code>iframe</code> tag not escaped.</li>
<li>Responsive supported.</li>
<li>Keep aspect ratio. Default is <code>16:9</code>.</li>
<li>Keep <code>iframe</code> unescaped even in multisite. If you have multiple writers in your site, this might help without any roles-and-capabilities knowledge.</li>
<li>Align full and align wide supported.</li>
</ul>

Taro iframe Block

Add iframe block for your editor. Responsive and keeping aspect ratio.

WPXERO

WPXero Iframe adds a dedicated Gutenberg block for external embeds that do not ship a first-party Core block. Use it for videos, maps, audio players, dashboards, booking tools, donation widgets, LMS players, and other iframe-friendly services.
Why this helps SEO and discoverability
<ul>
<li>Editor & directory search — The block title, description, and keyword list match how people look for “iframe block”, “youtube embed”, “maps embed”, “Gutenberg embed”, and similar queries.</li>
<li>On-page context — An optional caption is output as a real <code><figcaption></code> under the embed so your page still has indexable text explaining what visitors are seeing.</li>
<li>Accessible names — Encourages a descriptive <code>title</code> attribute on the iframe for assistive technology and clearer browser behavior.</li>
<li>Crawler-friendly fallback — A <code><noscript></code> block includes a plain link to the sanitized HTTPS embed URL when scripts are off, so bots can still discover the destination.</li>
<li>Performance — Lazy-load mode only loads the small front-end helper script when that option is enabled.</li>
</ul>
Pair it with your SEO plugin (Yoast, Rank Math, SEOPress, AIOSEO, The SEO Framework, etc.) for meta tags, schema, sitemaps, and analytics.

Iframe Block – Easy Embed Block for YouTube, Vimeo & More

Embed responsive YouTube, Vimeo, Google Maps, and other HTTPS iframes from the Block Editor. Optional visible captions, iframe titles, semantic figure …

Taro iframe Block vs Iframe Block – Easy Embed Block for YouTube, Vimeo & More