Why no one is talking about Spider-Zero being a future version of Gabriella O‘Hara
She was present as just Spider-Zero in the Spider-Verse 2019 comics, as a young teenager who lost her world and traveled from universe to universe, ultimately recruiting Spider-Man. She tend became the Master Weaver, who guards and protects the Web of Life and Destiny, pretty much the job Miguel has in Across the Spider-Verse.
Most importantly, her name and identity was never revealed in the comics. She lost her world due to an Incursion, which caused a dimensional contraction, basically two realities or Earths to collide with each other. I can totally see this in what Miguel did when he reemplaced his other self, but with a more Matrix-like imagery.
She traveled through worlds, and then became Master Weaver. But most importantly, she contacted Miles Morales to help her repair the Web of Life and Destiny.
If she is not in Beyond the Spiderverse, then I will be deeply disappointed.