"Modular stations or ships" multiple modules make one big "station"

How many people has made modular stations or ship pls show some designs

What precisely do you mean by “modular”? All three of the below are popular options

  1. A group of ships/stations in the same fleet
  2. A tractor-trailer system where a tug tows around a mission module
  3. A big mothership with fighters, engineless missile pods, scouts, etc. in its hangars

The first one

Ships or station as RP as module parts that make up a massive station or ship