page template

Hello,
I am using Oceanwp with a child theme, I created a custom page with the singular.php page which I renamed template-demo.php, I modified the header of the template-demo.php file to that it is recognized in the models, here is the information that I put:

I also use a CPT UI plugin and when I create a new article with this plugin, the OceanWP theme options are no longer visible at the bottom of the page, an idea
Thank you