Partners are everyone with monetization (revenue sharing) [1]. It's available in many many countries [2]. The countries you are listing are the early access to newer features like superchats, merch store, etc [3]

It's all there, no need for rumors and hearsay.

[1] https://support.google.com/youtube/answer/2475463

[2] https://support.google.com/youtube/answer/7101720

[3] https://support.google.com/youtube/answer/13429240?sjid=1824...