How to create a subdomain in BitrixEnv?

Question

CMS

There was a problem when creating a subdomain for a site on 1C-Bitrix.
What is available:
Dedicated server with its own IP
Full access to domain management
BitrixEnv is deployed on a dedicated server, on which there is already a site on 1C-Bitrix.
What you need to do: create a subdomain to a specific folder.
The problem is that there is no server control panel as such; it seems like it should have been IPSManager, but apparently it was rewritten to BitrixEnv. I can manage the server only through SSH (I go through PuTTY).
The domain pointed to the IP server A zone * and just in case AAAA zone * on IPv6.
Tried to create sites via SSH. It seems that they were created with the link type, but to no avail - the browser gives an ERR_NAME_RESOLUTION_FAILED error when switching to a subdomain.
I don't know what to do anymore.