The buttons at the bottom of the editor are Joomla editors-xtd buttons, so they are controlled using Joomla Access Levels, which you can set for each button in Extensions -> Plugins.

Nothing else that is on the screenshot I sent you seems to have a plugin for it.

All those buttons will be an editors-xtd plugin.

Go to Extensions -> Plugins, and from the Select Type list, choose editors-xtd. Click on the name of the button to edit it, and select the required access level from the Access list.