We’re not sure how Andrew Warkentin is accomplishing it, but he has included #MessagePad 2000, 2100, and #eMate variations of #NewtonOS 2.1 in his massive Virtual OS Museum project.
virtualosmuseum.org
Over 1,700 pre-installed operating systems spanning 1948 to today, in a single Linux VM. Bundled QEMU, VirtualBox, and UTM. One-click launchers for Windows and Linux.