"Peasant Simulator" could be a fun type of game.

You could make it as a mod to CK3. Instead of a royal household, you manage a peasant one.

Most of the same mechanics of personnel and resource management, decisions and succession still apply.

Medieval Dynasty attempts to do that. Despite having the word "dynasty" in its title, it's peasant centered. Early game is about building a house and trying to survive. Later game is building a village, recruiting people, assigning jobs to them, and essentially being the mayor. In many respects, it's a first-person village builder.

The "Dynasty" part comes from being able to have children and pass the village along to them if you play long enough. But everyone in game is a peasant of some sort. Nobility is mentioned but never directly visible.

I wouldn't call the game accurate exactly. But it is fun. I especially enjoyed having a ground-level view instead of the birds-eye view of most city builders.