Snikket (which is run by a Prosody dev) is aiming to be the “one app” of XMPP. Their Android version is, IIRC, rebranded Conversations. Not sure on iOS/macOS but I think they have something there as well. And of course their server software is Prosody with a few extra plugins configured by default. All FOSS
This is why I never bother with any “easy install” scripts of any kind. Give me a list of Docker images, a list of environment variables / config files, and some form of reverse proxy configuration and I’ll figure out the rest. You don’t know how my server works better than I do.