It’s easy to check whether your multisite will work on the Pressillion platform.
First, go to My Sites -> Network Admin -> Sites in the top-left menu.
Here, you will see your site and subsites.
Path-based Network (Subdirectories)
If your sites begin with the same domain but end differently (with a different directory), ie; domain.com/uk or domain.com/us, you have a subdirectory multisite.
This configuration is fully functional on Pressillion.
Domain-based Network (Subdomains, Domains)
However, if your sites include subdomains or different domains, ie; uk.domain.co or us.domain.com
This configuration is not currently supported by Pressillion.