Recently, mounting activist/expert pressure has been forcing companies to take decisive action on this issue: both Google and Discord made announcements this month about expanded end-to-end encryption testing and roll-out:

https://www.theverge.com/2023/8/8/23824800/google-messages-rcs-end-to-end-encryption-default-group

https://twitter.com/AlternativeTo/status/1691043492871495680?s=20