Page override not working

I have created a child theme from bootstrap. I have a page that I want to control the handling and formatting of, so I have created a page-212.php file in the both the theme and child theme directory. It is not being picked up, rather the page.php in the parent is being used. I did take a copy of page and add to the child, when it is present, the child is being used. I am testing this on my desktop (WAMP) system and would appreciate any guidance.

Ultimately, I would like to move away from the page number (212), and move to the slug, but since its a child page, I wasn’t sure if the page would be referenced as ‘page-events-brewer.php’ or ‘page-brewer.php’.