Please note that I have moved your post over to the #mobile-video-sdk:android category as you appear to be asking about the Video SDK.
After joining a session, you can call ZoomInstantSDK.getInstance().getSession() to retrieve the current session. On that session object, you can either call getSessionVideoStatisticInfo() to get the video info or getSessionShareStatisticInfo() to get the share info for the current session.
getSessionVideoStatisticInfo.fps returns zero when only the host is in the session. The sample app only shows the frame rate for those who are NOT the host.
I have responded to your other post regarding this behavior. Please try to refrain from posting multiple times about the same topic so that the forum remains as easy to navigate for everyone as possible.