Umbrel OS for aarch64 (feature request)

I saw that @fran has a unofficial version of v0.5.4 - has anyone tried setting up v1.x.x in a similar manner? I want to run Umbrel on a spare Jetson I have, and with NVENC I think it could be a lot more powerful at least in terms of being a media server (I use my umbrel as a media server for the most part). Any advice on how I could go about building an image for the Jetson platform or aarch64 in general?