How to make and include different routing files inside one route file?

I am trying to make more robust app with CI4. I am trying to separate many functions along with their routing configs.
But I can't find a way to include another routing file inside Routes.php

Here is an example:

There is a route file called example.route inside /Views
 How can I include that file inside Routes.php so that the Routs.php looks cleaner .