Commentary for Kiddushin 133:10

Ravin discusses how to figure out what generation Egyptian or Edomite (both prohibited for the first three generations) is. If non-Jews marry, say a first generation Egyptian marries a non-Egyptian, we follow the male. But when they convert, the more inferior status is followed, not the male. This does not follow the rule of the mishnah where the status follows the male. [A convert may marry an Egyptian convert].
The Talmud now reads “this is the case” as excluding two non-Jews who convert.