Plutonium

I currently host the server "PostalCore" on a windows VPS. I'd like to use my VPS for other things on the side but can't because they're all Ubuntu 20 things. Why aren't the server backends supported on literally any linux distro? I could make support for ubuntu unless there's some underlying reason why it won't work. I'd be happy with just an explanation as to why there's not any sort of linux support for backend.