Yes, it's possible and not sure if we can directly infer that it's intended to be possible, though. It even was supported by Mp3tag in an earlier version. Mp3tag is reading those files, so you can see that the correct functions are used.
However, there is a difference between what the file system and what the Windows Shell supports. The latter, to my knowledge, doesn't support leading whitespace characters for folder names. This is probably also the reason why those are automatically removed when creating new folders via Windows File Explorer.