Aunt May is probably the most under-serviced character in the Spider-Man movies.
Her emotional support is vital, but we’ve already seen five movies of that.
No one wants to watch May chide Peter for forgetting the eggs when there’s way more interesting superhero stuff to get to.
She’s there to hand out really specific advice that would only be useful to Spider-Man, though she never actually comes out and says she knows her nephew’s biggest secret.