Webnow

WebNow Emoji Reactions enables quick, engaging reactions for your site visitors by injecting an emoji reaction bar into single post views.
Key features:
<ul>
<li>Add emoji reaction buttons to single post pages.</li>
<li>Admin settings page to configure emojis, label text, display position, and which post types show reactions.</li>
</ul>

WebNow Emoji Reactions

Short Description: WebNow Emoji Reactions adds a one-click emoji reaction bar to posts, allowing visitors to express reactions using emojis.

theode

With the use of shortcodes it is possible to react to the content by emojis. 
So you install the plugin and create new emoji with a title an emoji itself, a count field and an initial count, to fake the initial value of the clicked emoji. 
The shortcake is [emojized id=“8” count=“true”] (or false or empty)
In the new version you can limit votes to one per user.
This plugin demands WP REST API plugin.
It has the same approach as the plugin “Emoji Reactions” 
https://wordpress.org/plugins/emoji-reactions/ 
but that seems to be discontinued.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/VaNw_Xh35NM?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>
So have fun with emojis.

Emojized

Emojized allows visitors to a WordPress site to rate and react to content using Emojis. Because text without them is  🅱🅾®ℹ️🆖

WebNow Emoji Reactions vs Emojized