Microsoft doesn’t actually have an official way to make a bootable USB on anything but Windows. It isn’t too bad to make your own installation media, the only real hurdle is there is a 5GB file but FAT32 doesn’t support files that size. Should be easy, but I messed it up somehow and windows couldn’t find any drivers.
https://github.com/TechUnRestricted/WinDiskWriter to the rescue, worked like a charm.