“It’s under what is termed a Black budget.”
You don’t announce black budget operations on twitter, so that’s easily ruled out.
“Space launches could contain something other than published.”
Okay, but then they would obviously have to NOT contain what was published. So what satellites or cargo shipments to the ISS have mysteriously gone missing so that something else could have been substituted in its place?
We already have things in space that we don’t know about.