Many dimensions which featured Robotechnology were known to exist. One notable example was the "primary" Protoverse. (Macross Saga: Boobytrap, et. al)
This Protoverse was notably somewhat close to the Voltron Universe, and elements from the two universe accidentally crossed over at one point. (Robotech/Voltron) The universe spanned a long amount of space, with multiple solar systems, planets, and species. (Robotech, Robotech II: The Sentinels, et. al)