I've been trying to follow their progress, but they haven't been updating their blog in 3 years. And they seem to just communicate using discord. So there isn't much publicly accessible visibility.
There's probably not that much interest in getting MacOS software running on Linux, especially now that they're going the ARM route. Windows was always a promising platform because it was ludicrously stable and had loads of crazy software and games on it. The risk/reward was high, but relatively low compared to doing this with Apple software. Plus, all this would be a whole lot of work to get a janky version of a non-native program. Most people who already daily-drive Linux probably don't miss the MacOS version of Twitter, or some weird native git client.
