Let's create a fantasy world together.
I did this once for my D&D group (actually, we ran it in Pathfinder 1, since there was no Pathfinder 2 back then and everyone wanted the added crunch). For the game, I created a base kingdom. As the DM, it was the major power in the area, and sort of defined the world as a whole.
Then I had each player create their homeland. They got to decide what kind of nation they were from, every and any detail they wanted to create, as much or as little as they were interested in, including who ruled it, what the major religions were, topography, location, major cities, history, what kinds of people lived there, major trade goods, legends and what kind of relationship that nation had with the base kingdom/major power I had outlined for them.
I wove all their lands together into a tapestry, and we created a world together, then played in it. We could do the same thing here, if anyone is interested.
So, interest check - anyone interested?