Many The Sims 4 players hastily upload their lots directly from Build mode. While this is quick and easy, it often skips the vital test to see if the actual building and objects are functional. Many players use the Gallery to populate their town and provide adequate lots for their Sims. But, it can be a burden if the fridge is inaccessible, the toilets are blocked, or if various floors can’t be easily accessed.

https://screenrant.com/sims-4-gallery-mistakes-avoid/