Hi again. After learning (and practicing) more Factorio Lua programming, I have found a much simpler way to support modded spawners without MP desync or other compatibility problems.
I have applied that to 0.17.10 / 0.18.2. They should principally show info of all modded spawners, too. I have tested with "Cold Biters" and "Explosive Biters" mod. Their modded spawners are displayed.
But as you are for "Biter Factions" mod, I actually realize there are NOT new spawner types, right? So there are no new spawner types to show in the GUI... So the new updates are not useful to such use...
The main problem to support "Biter Factions" mod is: there are five factions, each have their own different evolution factor values. But for my mod GUI, I am scratching my head but still cannot think of a proper way to fit five evolution factor values (and the derived evolution phases), together with different lists of spawning probabilities according to each faction's evolution factor. That would need a major revamp of the whole GUI. I would become a detailed table or interface like the production statistics screen, instead of my current small side panel.
So I do not think I can support this part.