Discord is experimenting with end-to-end encryption for voice and video calls to improve user privacy. The company is considering using Messaging Layer Security (MLS) for this purpose. However, this testing does not extend to its Stages feature.

https://alternativeto.net/news/2023/8/discord-begins-testing-end-to-end-encryption-for-voice-and-video-calls-to-boost-user-privacy/