Can I create a sub-domain that points to a directory?

Yes, with a hosting plan associated with your domain, you will be able to create subdomains that point to a specific directory from the hosting management panel. How do I access the administration panel of my hosting?

Once inside the hosting panel, in the "Websites" section, you can create a new subdomain from the "Create subdomain" button.

Once the subdomain is created, pointing to a specific directory, accessing that subdomain will display the FTP content hosted in the specified folder.