TypedDict does not allow optional keys?

Since Python 3.11, as per PEP 655, what you need is NotRequired:

class _trending(TypedDict):
    allStores: NotRequired[bool]
    category: str
    date: str
    average: List[int]

notice that you shouldn’t use Optional in TypedDict, and only use (Not)Required

if you want to use TypedDict with Pydantic, you could refer this article