Subdomain on subpage

I would like to route a subdomain (https://test.mydomain.org) to https://mydomain.org/test. This without a redirect page. Is this possible with GRAV?

This should work by default, if you remove subdomain config. And to redirect I'd probably add a CNAME entry to domain DNS records

The DNS entry is for a physical destination. Where is this in the GRAV structure? Surely it is not ../home/www/grav/user/page/08.test? Where do I physically call up the Test page?

Based on your original post, your Grav installation is on a test folder. After your reply, I actually have no idea what your setup is 😕

Sorry, perhaps I have expressed myself incorrectly.

The CMS GRAV is installed in the folder “../www/grav” and the domain mydomain.org is rooted to this folder.

Now I would like to root the subdomain test.mydomain.org (this does not have to be a subdomain, could also be another domain, e.g. test95.org) directly to the page https://mydomain.org/test', which is not on the root of the CMS? I don't want to have to create a redirect page on the root. Is that possible?

@madu:
the domain mydomain.org is rooted to this folder.

What does that mean? I've never seens such expression, that domain is rooted to something. Is there some htaccess rewrite? Is there a redirect?

As I said, I would just add a CNAME entry

test.mydomain.org.  1   IN  CNAME   mydomain.org/test.