In the beginning of the episode Kit gives Gobbles a juice box, he then fumbles around with it and jabs the straw on the wrong side of the box twice before finally getting it in the hole. Later Kit gives him another juice box and he nails the straw effortlessly on the first try. This showcases his learning ability and shows that he actually does learn as he goes along
In the teaser we see Oh Father angrily storming into the White House, we then see him scared when Homelander arrives and then see Ashley running in fear escaping through tunnels under the White House. This lines up with the most recent leak that claims Oh Father confronts Homelander over the church losing funding and then being killed by Homelander, which is witnessed by Ashley who flees in terror. We also see Starlight fighting the Deep, which is also stated in the leak but is pretty easy to guess