For the past ~2 months, I have been hacking away at making a native XMPP client for Ubuntu Touch. When @brenno.almeida released Greenline, the opportunity was too good to pass up. There exists an XMPP client called Libervia (formerly known as Salut a Toi) that works as a background daemon, and thus could fit pretty much straight into the existing architecture of Greenline.
Many experiments later, we now have Greenline but yellow the internals have been completely redone in an unholy abomination of Rust (of course) and Python (because Libervia is written in Python). It's a fully confined app that supports most modern XMPP basics, with a few features that still need to be implemented (e.g. reactions).
The client is considered to be in alpha state, but is available on the OpenStore for testing. I consider it functional enough for daily use, but with rough edges. This thread is a discussion/support thread for the app. More specific bug reports should be filed at the git repository: https://git.agnos.is/projectmoon/livewire
You can find it on the OpenStore. I expect a handful of updates in the next days/weeks to address the most glaring bugs, and then to work on proper push notification support, which will be its own interesting journey.