So, ehm, Mobian is just an ARM build of Debian. It literally pulls from the same upstream package archives etc. Also Matrix.org is a well-regarded free software community making an open, privacy first, federated chat software. It's the sort of people you'd want if you care about free software, privacy, openness etc. I am honestly a bit shocked you haven't heard of Matrix.org - they're fairly well know in the community at this point.
