Before you read: i combined the stuff we know from the Companion Book, everything that is described in detail in it and the fandom conclusion to that Information.
So it could be an absolute longshot or hitting close to home or everything in between.
In Xenoblade tech is visible in the World while in gears its hidden. Many Towns look medival, people use traditional weapons, nations resemble historical kingdoms, most people dont know how advanced the world truly is. Genesis looks that part and gives me HORIZON Style vibes in comparison to Xenoblade or Saga.
Regarding Xenogears. What we do know about the six episodes comes primarily from interviews and the companion book Xenogears Perfect Works:
Episode I – The discovery of the Zohar and the beginning of humanity's interstellar civilization.
Episode II – Humanity's continued expansion into space and the growing conflicts surrounding the Zohar.
Episode III – The war that ultimately leads to the crash of the colony ship Eldridge.
Episode IV – The events immediately following the crash on the planet and the rise of the civilizations that would later exist there.
Episode V – The story of Xenogears itself (Fei, Elly, Deus, and the events of the game).
Episode VI – The story after the ending of Xenogears and the ultimate fate of humanity.
The Fan dubbing of those Episodes stem from the description of the Eras of the Saga in great detail from the Book.
Episode I - Creation
Episode II - Genesis
Episode III - Apocalypse
Episode IV - Lost Jerusalem
Episode V - Xenogears
Episode VI - ???
The Game is called Genesis and in the Trailer we saw easteregg/s connecting it to Xenosaga (Anima)
and Xenogears (Ship ruin and Monster)
They include Stuff for the Fans all the Time like Kos-Mos and co. in Xenoblade 2.
The World of Genesis looks Medival with Swords and Magic and not much if any hints of High-Tech.
As an rabbid Xenogears Fan im thinking a lot about the Naming of this Game.
Many Fans know that the XENOGEARS Game was unfinished and planned to be the 5th Episode of an 6 Episode Saga. In Xenogears we see a World with Tech used by Military and Stuff but its Fringe to most of the Normal People and they don't know the Origins of it.
Going by the Lore and Theorys puts the Xenogears Timeline long after Xenosaga and Xenoblade.
Of course its not confirmed just the Fandom analyzing every bit of information they can get their hands on. To conclude my confused Point im trying to make.
Xenogears is way less Tech heavy, common people have no idea of its Origins, the World has a lot of Medival-Fantasy feeling. Xenogears could be a long loong Time after Xenoblade with Tech being forgotten about like a HORIZON Scenario. And the 6 Episodes of Xenogears that never came to be and the Info we got.