erez_lieberman

This very simple plugin Hides the top three fields (author, email, and website) in comment form and after you will click on the big comment field this three fields will be open smoothly.
After you upload and activate the plugin the comments forms on your site will look like this: 
 <iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/SIZOk0WA3sE?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
in the <a href="https://wordpress.org/plugins/wp-toggle-comments-form-fields/screenshots/" rel="ugc">screenshoot section</a> you can look on the first screenshot – it’s a litlle animated gif that illustrates the effect. 
You can see a live preview of this plugin in <a href="http://www.studio-hitchadshut.co.il/%D7%AA%D7%95%D7%A1%D7%A3-%D7%97%D7%93%D7%A9-%D7%A9%D7%A4%D7%99%D7%AA%D7%97%D7%AA%D7%99-%D7%9C%D7%90%D7%AA%D7%A8%D7%99-%D7%95%D7%95%D7%A8%D7%93%D7%A4%D7%A8%D7%A1-wp-toggle-comments-form/" rel="nofollow ugc">my site</a>, this is a blog post(in hebrew) about my plugin, in the comments form(bottom of page) of this post you can see how its look like with this plugin.
<h4>Languages</h4>
<ol>
<li>English</li>
<li>Hebrew</li>
</ol>

WP Toggle Comments Form

Toggle The Comments Form Fields On Wordpress Posts And Pages

WordPress.org

Andrew Ozz

Marius L. J.

With the update to WordPress 5.5, a migration tool known as <code>jquery-migrate</code> was no longer enabled by default. This may lead to lacking functionality or unexpected behavior in some themes or plugins that run older code.
This plugin serves as a temporary solution, enabling the migration script for your site to give your plugin and theme authors some more time to update, and test, their code.
With the update to WordPress 5.6, the included version of jQuery is also upgraded. This means that old code that previously caused warnings now may instead may cause errors or stop working entirely.
Some of the features no longer working will just stop working behind the scenes without any apparent problem.
The plugin will let you downgrade to a previous version of jQuery for a period, but as a site administrator you are encouraged to get the underlying issue fixed.

Enable jQuery Migrate Helper

Also lets you know when it's no longer needed!!!!

This is what I call going above and beyond. I would rate 10 stars if I could. You deserve it.

Love it, super simple - perfect solution

Get information about calls to deprecated jQuery features in plugins or themes.

WP Toggle Comments Form vs Enable jQuery Migrate Helper