@Uriel_Paradisi_Anteovnuecci has written a very comprehensive lore guide on trigs in general, find it here: [Compilation] The Lore of the Triglavian Collective
Note that I haven’t updated this since Pochven so it’s a little outdated. TL:DR in Pochven:
- trigs seem to be “bioadapting” both planets and people
- Svarog are ruthless and fight heavy wars with remaining, dwindling populations
- Perun have forcibly moved populations to certain areas in the cities
- there are “provisional governments” of some kind in Krai Veles