Option to modify the inherited container item from another channel(subsite)

I was just figuring out how the inheritance work(BloomReach CMS 13.3.0) in various cases. I created a page in my parent site with it’s content (components and documents) and now the same sitemap page is available in the inherited subsite.

But the document container slot(Simple content component) is empty as the same content document is not available in my linked content folder for the subsite and other container slot in the same page shows a mesasge - Cannot be edited in this channel. Would there be any option to modify the container slots of the inherited page in subsite to add subsite specific component/content document, so that the CMS user can choose the required component/content document for the subsite instead of rendering the same content of parent page. Would that be possible? What would be the suggested approach? Any help appreciated.