I can't speak for Nauticam, but I suspect no one replied because no one had an answer? My working assumption (unless cautioned otherwise for a specific port) is that the ports are rated to the same depth as the housing, unless perhaps you get one of their "deep rated" special order housings.
It would not surprise me if the larger glass domes have a shallower rating than a smaller acrylic port.
Since I don't dive to 60m, let alone 100m, I guess I have never given this much thought.
Edit to add...This might be of interest to you: