Random Fun reason Miguel looks so different in the sequel is because they made the end scene super quick, using Peter's existing model to make a basic Spider-Man 2099. The Sonic movies did the same thing using Sonic's model to create Tails in 1, and Shadow in 2.
I'm glad to see Miles's mom look more prominent in this movie, basically taking the dad's role to help inspire her son.But it also makes me worried that this scene is suggesting Miles lost his father