The Verge: Google is rolling out end-to-end encryption for RCS is in Android Mes
sages beta.
[1]https://www.theverge.com/2020/11/19/21574451/android-rcs-encryption-message-e
nd-to-end-beta

References

   1. https://www.theverge.com/2020/11/19/21574451/android-rcs-encryption-message-end-to-end-beta