I have a requirement which ask me to fetch information from an existing page. so I use HubL function page_by_id to get the page.
I use page developer info tool to view all available information in the page. There're so many properies in the json. But I find out that some properties can be used but most of other cannot be used.
some common properties like name, title, absolute_url can be fetched by {{my_page.name}}. Some other properties like buffer_mode, site_settings etc will not working.