I created a spread sheet in the Apple iCloud on my PC. Will it automatically appear on my iPhone?

It has not appeared and it has been at least 15 minutes. Does the sync only work from iPhone to PC iCloud and not the other direction?

It works both ways

I have noticed that things don't automatically appear onto my device via iCloud unless I create a new folder from my iPhone. Doing that seems to update it

It seems that if I drag something into the folder it uploads but if I create it with the Numbers program it just sits there.