By default, modules are only meant to be used on modular pages, by adding them via the Front-End Editor or in the Page Settings.
Now, if you need (reeeally need) to use them somewhere else, there’s a Module Shortcode that will output a module anywhere.
To use it, add this into any visual editor in the theme:
And replace the module ID (that 57 in the shortcode) for the right module ID that you want to bring.
You’ll have to test each specific module for proper functioning, since the possibilities are too vast, but this should bring the module.
If you need to use it on a sidebar, the “Text” WordPress widget will be ok for that.