Does Eos Plus support Steam and Tencent onlinesubsystem?

Currently, features such as achievements, statistics, microtransactions, friend list and friend avatar retrieval, authentication, and DLC are implemented using steam API and OnlineSubsystemSteam.
question

  1. Using eosplus, is it possible to make API calls through the same interface on multiple platforms?
  2. Can I use all of the above Steam functions with eosplus?
  3. Does eosplus also support OnlineSubsystemTencent?