my English is too bad, so sometimes I use a translator, I would like to apologize if my last comment did not have the meaning that I wanted to convey. And besides, Khemia basically tells not the story of the MC, but what happened in Adastra.
If khemia and Interia are not a continuation of Adastra, but they go in chronology with it, then Adastra is destined to have a continuation, because it would not be very good if the developers simply left us with three different stories that never came to their logical conclusion