You don't state which version of RFA you are using, however, the mechanism for downloading real-time data from Refinitiv Real-time remains the same and is described in the tutorials for the relevant language version of RFA:
You will need to identify the RIC codes required for the data you require - for which you can either:
NOTE: If you are writing a new application/upgrading an existing one and using Java or C++ then we do not recommend using RFA (it is 'feature complete' and has not been actively developed for several years now). Please look at our Real-time SDKs:
The Enterprise Message API included in the Real-Time SDKs is much easier to learn, code and maintain compared to RFA and also includes newer features.