Hello,
It sounds like full cross-server events for your server have not yet been enabled. I will inquire about this for your server.

OK, it looks like your server is part of the group of servers that was meant to have a new cluster formed and cross server events added for these servers a while back, unfortunately, this was pushed back due to other things coming up (the GDPR issue was a big one that took up a lot of the devs' time). At the moment we don't have an exact time frame on when these servers will be getting merges, a new cluster, or cross server events, but we are hoping that it will be sometime in December. There will be an announcement on Discord and in the news section of the forum when this happens.
Sorry for the delay on this, and thanks for bearing with us through this. I know it can be frustrating to have to deal with this. :(