Like the question implies, I really want too get off of instagram. Its not the same space anymore, especially with the consistent push from Meta to use AI. Ive even made my profile private so those features don’t automatically turn on. Its gotten crazy there.
Signal used to do text messaging as well but they removed the feature. As they felt it was unclear when a message was fully encrypted ( signal message ) and when it wasnt ( text /RCS message ).
I don’t think there’s a privacy friendly chat app that also does RCS.