Is Google Cardboard really not available in Hong Kong?

[AC Question]

I live in Hong Kong and my phone is a Sony M5. When I search Google Play it doesn't find Google Cardboard. When I do a web search and click download from Cardoard's web page, it opens Play but says my device is incompatible. I think it just means that it can't be downloaded in Hong Kong right? Will Cardboard ever come to Hong Kong? I really want to try it.