How to add “Content Aware Sidebars” to Php template via php short code

I highly recommend adding a default sidebar to your theme like this:
https://developer.wordpress.org/reference/functions/register_sidebar/
https://developer.wordpress.org/reference/functions/dynamic_sidebar/#user-contributed-notes

You can then use CAS to show another sidebar/hide the sidebar altogether on certain conditions.

Otherwise, you can add the sidebar shortcode to your theme like this:
https://developer.wordpress.org/reference/functions/do_shortcode/

I hope this helps!