Smells like a real insider to me, either an embassy employee or an undercover intelligence service person. Both are often the same.
Discussion
Seems to be often aware of things when diplomatic channels get busy, definitely in a privileged position to have access to info, and definitely based in Geneva.
Do you mind sharing the link to that TG channel? You can DM me, if you don’t want to make it public.
The channel is public https://t.me/coronalive
Started as a coronavirus channel, then went quiet. Got back online when Russia invaded Ukraine.