Change plugin name on WordPress repo

You can change the name of your plugin, you just can’t change the url slug of your plugin. Meaning, if you initially added a plugin to the repo and it was called “Posts With Ad Thumbnails” your url would be: https://wordpress.org/plugins/posts-with-ad-thumbnails/

After uploading your plugin, if you decide to change the name just edit your primary plugin file: Plugin Name: name of plugin to its new name and commit the change. Your plugin url will stay the same, but the display name will change.

Ref: https://developer.wordpress.org/plugins/wordpress-org/plugin-developer-faq/#can-i-change-my-plugins-name