It appears at first glance that Signal and Comey's FBI helped spread crypto paranoia across platforms and change public opinion in favor of companies protecting people from the government.
Signal developer went over to Apple. If you recall that part about Apple refusing to decrypt a user's phone, he probably gave them the design.
https://techcrunch.com/2016/02/25/apple-hires-developer-behind-signal-edward-snowdens-favorite-secure-chat-app/
https://twitter.com/FredericJacobs
https://bgr.com/2019/06/06/ios-13-features-iphone-bitcoin-wallet-apps-possible-with-cryptokit/