sators

This plugin allows you to add link=”none” to your Gallery shortcodes to create a gallery where the images do not have any links associated with them.
To use, simply add the shortcode as follows to your page/post: [gallery link=”none”]

Gallery with No Image Links

Allows users to use the [gallery] shorttag with link="none" in order to have an image gallery with no links. [gallery link="none"]

WPKube

The plugin restores the <code>Title</code> field (that was removed from WordPress 4.2) in the insert link popup box and adds a new <code>Add rel="nofollow" to link</code> checkbox to it.
Gutengerg (Block Editor) Note: At the moment it’s not possible to add the functionality to Gutenberg, it’s a different system from the classic editor and it does not have a hook/filter which allows adding custom settings. As soon as it becomes possible to add the functionality to Gutenberg we will update the plugin.
This plugin has been adopted and maintained by <a href="https://www.wpkube.com/" rel="nofollow ugc">WPKube</a>, a popular WordPress resource site, where you can find guides on <a href="https://www.wpkube.com/category/wordpress-plugins/" rel="nofollow ugc">WordPress plugins</a>, <a href="https://www.wpkube.com/best-wordpress-hosting/" rel="nofollow ugc">WordPress Hosting</a>, and more.

Title and Nofollow For Links (Classic Editor)

I just installed this on WP 4.9, and it works like a charm. I ended up adding HTML Class manipulation as well, by coping the code in the JS file that added the title field.

Works Well

works with wp 5.2.1

Helpful tool

The plugin adds a title and a rel="nofollow" checkbox to the insert link popup box. Only for Classic Editor, NOT Block Editor.

Gallery with No Image Links vs Title and Nofollow For Links (Classic Editor)