whaze

Whaze Term Order for Posts lets you enable per-post custom ordering of taxonomy terms directly from the Gutenberg editor sidebar. Configure which post types and taxonomies are managed via the admin settings page, or register them programmatically in code.
Admin settings page:
Go to Settings → Term Order for Posts to enable term ordering for any post type / taxonomy combination — no code required.
For developers (optional):
Register a post type / taxonomy combination programmatically:
<pre><code>add_action( 'init', function () {
 whaze_term_order_for_posts_register( 'post', 'category' );
 whaze_term_order_for_posts_register( 'movie', 'genre' );
} );
</code></pre>
Retrieve ordered terms in templates or REST:
<pre><code>$terms = whaze_term_order_for_posts_get_terms( get_the_ID(), 'category' );
</code></pre>
Features:
<ul>
<li>Settings page to configure post type / taxonomy pairs — no code needed.</li>
<li>Opt-in auto-apply: custom order applied automatically to native blocks, classic theme functions, and any code using <code>get_the_terms()</code> — no template changes required.</li>
<li>Drag-and-drop reordering panel in the block editor sidebar.</li>
<li>Order saved automatically with the post — no separate AJAX call.</li>
<li>Falls back to default WordPress term order when no custom order is set.</li>
<li>Unused order entries are cleaned up automatically when terms are removed.</li>
<li>REST API field <code>term_order</code> for headless use cases.</li>
<li>Fully translatable (i18n-ready).</li>
</ul>

Whaze Term Order for Posts

Order taxonomy terms individually per post, directly from the Gutenberg editor sidebar.

ceslava

Have you tried to find out which one from your tags was created first? Or Which term for your custom taxonomy was last created?
Last one happens to me, I had so many terms on several custom taxonomies that I wanted to know which ones were last created. The problem is that there is no record of the publish date on the wp_terms table from the WP Database. But since IDs are auto-incremental we can use this field to order by date our terms.
So I added an extra sortable column with the ID term to your taxonomies (Tags, Catgeories or Custom Taxonomies).
By default Tags and Categories pages will have the extra column. If you want to add the extra ID / Date column to your custom taxonomies go to the plugin settings page at Settings -> IDATERMS.

IDATERMS

Add an extra column with the ID term to your taxonomies (Tags, Catgeories or Custom Taxonomies) so you can sort your terms by date.

Whaze Term Order for Posts vs IDATERMS