Sir Lanka nation should have A visa to Hong Kong if stay less than 7 days for tourist?

Yes, you can submit your application to Chinese embassy in your country. If your application is processed by Chinese embassy, you will get it in 4 days. If your application needs to be sent to HK Immigration Department, it takes around 4 to 6 weeks.

For your Macau visit, you should apply one from Chinese embassy in your country directly.