What’s funny is this is pretty out in the open, and ppl don’t realize it. When Yasha Levine criticized signal, the president of Radio Free Asia (a US government propaganda org), sent this out, openly pushing Signal to european internet freedom communities:

Our primary interest is to make sure the extended OTF network and the Internet Freedom community are not spooked by the [Yasha Levine’s] article (no pun intended). Fortunately all the major players in the community are together in Valencia this week - and report out from there indicates they remain comfortable with OTF/RFA.

And I remember you mentioned before, Meredith Whittaker, president of the Signal Foundation, holds interviews with US defense-department think tanks.