Ballast is a library I recently released, which supports all major targets, with examples in the repo. I’ve been running it in a production Android app for a while now and it’s been very stable, as well as with several Compose Web and Desktop side-projects, and it’s holding up very well to them all.
I took a lot of inspiration from Orbit in creating Ballast, but specifically worked to make it less tied to the Android ecosystem so that it works just as seamlessly on other platforms. The programming model is much more explicit than Orbit, looking more like Redux than the “MVVM+” style of Orbit, which you may or may not like.