Sadly they do not ship international, but I do have one on order via a friend in Taiwan, with an ETA of around 4 weeks!
As others have mentioned, with such a MB you not only do not need a GPU, but you also do not need a VGA monitor, because you can do everything via IPMI.
I have dumped all my VGA monitors many years ago, and I assume that this has also happened for others.
If you use third party IPMI tools, there should be no problems.
It may happen that you could need to use the Supermicro application for some features, e.g. for BIOS settings and BIOS updating.
That should work, but I find it extremely annoying that the Supermicro application is a Java GUI application that does not honor any Linux desktop configuration and which does not provide any means to change the font or the size of the window.
Unfortunately, this is a misfeature of all Java applications that I have ever seen provided by various companies as supposedly "running everywhere" (not to mention that the Java installers for various commercial programs typically crash if you happen to have a 10-bit color monitor, both on Linux and on Windows).
Because of that, on a 4k monitor everything is far too small. At least in Linux, you need to either lower your display resolution or use some accessibility tool that can scale a window, e.g. by duplicating the pixels.