Another similar game to Dwarf Fortres is Song of Syx [0]. It's more accessible then DF and I think they can have up to 20,000 entities active in the world at a time. The world map is pretty huge, and the player gets to control a one group among many. Every entity in Song of Syx is individually modelled, though probably not in quite the details that DF is known for.

[0] https://store.steampowered.com/app/1162750/Songs_of_Syx/