For example, if you open the Plugin Manager and look through the plugins you can expand the description and see a link to Get Support. But once the plugin is installed the Get Support link is missing.
Should a link be one of the menu options or are you putting a link in your plugin UI dialog?
I have both (depending on the type of plugin – Lorem Ipsum has it in the menu and Text Toolbox as a button in the UI as well as a menu item) and never had any problems from review for any of them
Can you show me an example where the get support link is no longer visible? I just checked my version of XD, and I can see it for plugins, regardless of the installation status.