I know that this has been discussed at least since 2015 (!) including here:
But is there any progress on this at all? This is at the moment by far my biggest gripe with Hype in that it really slows down my development working on a single 1920x1080 screen. I can see that at the moment you can dock the timeline anywhere within the single-screen UI but having a separate window for timeline (and Properties keyframes) would make a huge difference.
Please consider prioritising this, if at all possible!