The most successful multiplayer sessions often involve players specializing in specific sectors. One player might focus entirely on the grueling logistics of the rail network and power grid, while another manages the delicate needs of the citizenry, such as housing, heating, and culture. Agriculture specialists to feed the masses. Heavy industry leads for steel and mechanical components.
While a true multiplayer mod does not exist due to API limitations, the community frequently discusses mod ideas that could simulate interaction: workers and resources soviet republic multiplayer
To help you get your first collaborative republic off the ground: such as housing