I’m thinking of the things listed on the Privacy Guides real-time communication section
Yeah, about that. https://www.signal.org/blog/phone-number-privacy-usernames/
That’s my point. The phone number IS STILL required to create an account at Signal!
You can always run a self-hosted version of Signal or a fork of it, then you can do whatever you want with it, including not using phone numbers.
I’m not interested in running servers, in fact, my ISP doesn’t allow it anyway. I need something private that doesn’t ask for too much info off of me, and that’s why my solution was matrix, and not signal.