I thought one official with the FBI just recommended using messaging with end-to-end encryption, not one specific protocol; not the whole government.

https://arstechnica.com/tech-policy/2024/12/us-recommends-encrypted-messaging-as-chinese-hackers-linger-in-telecom-networks/

(I also recommend it but for more acute reasons, like the US also spying on reproductive health of people using American telecom systems.)