Is it possible to have all news-post additionally on a virtual (?) subpage called “news” so that I would have a second complete collection of all news-posts under
the easiest way would probably be to create a new template for /news where you query all children from home? root? Wherever those news posts are located. So something like:
What I wonder is why your children of home are running under https://my-website.com/my-news-post instead of https://my-website.com/home/my-news-post which would be the default.
And why not simply renamel home to news and make this new news page the home page. Having the same page under different urls is not really recommended SEO-wise.