I have yet to see a federated chat app my tech illiterate family can download and use. Sure I have set some up to test out but the UX is terrible on all of them. Matrix was the most polished but still horrible compared to signal.
Everyone loves to rag on signal here it seems. They would rather something be correct in ideals than help the largest amount of people. It’s a strange and holier than thou stance to take in my opinion.