Context API dispatch not called with onEffect while using expo-splash-screen

Question

When I am trying to use the dispatch function recieved with the useContext hook I cannot get the change the content of the data inside the context. It looks like as if the call wasn't even made, when I try to log something inside the conext's reducer it doesn't react. When I try to call it from other components, it works just fine.

Sorry if it's not clean enough, I'm not too used to ask around here, if there's anything else to clarify please tell me, and I'll add the necessary info, I just don't know at the moment what could help.

import { QueryClient, QueryClientProvider } from "react-query";
import LoginPage from "./src/pages/LoginPage";
import { UserDataContext, UserDataProvider } from "./src/contexts/UserData";
import { useState } from "react";
import AsyncStorage from "@react-native-async-storage/async-storage";
import { useContext } from "react";
import * as SplashScreen from "expo-splash-screen";
import { useEffect } from "react";
import { useCallback } from "react";
import { UserData } from "./src/interfaces";

SplashScreen.preventAutoHideAsync();

const queryClient = new QueryClient();

export default function App() {
    const [appReady, setAppReady] = useState<boolean>(false);
    const { loggedInUser, dispatch } = useContext(UserDataContext);

    useEffect(() => {
        async function prepare() {
            AsyncStorage.getItem("userData")
                .then((result) => {
                    if (result !== null) {
                        console.log(loggedInUser);
                        const resultUser: UserData = JSON.parse(result);
                        dispatch({
                            type: "SET_LOGGED_IN_USER",
                            payload: resultUser,
                        });
                        new Promise((resolve) => setTimeout(resolve, 2000));
                    }
                })
                .catch((e) => console.log(e))
                .finally(() => setAppReady(true));
        }

        if (!appReady) {
            prepare();
        }
    }, []);

    const onLayoutRootView = useCallback(async () => {
        if (appReady) {
            await SplashScreen.hideAsync();
        }
    }, [appReady]);

    if (!appReady) {
        return null;
    }

    return (
        <>
            <UserDataProvider>
                <QueryClientProvider client={queryClient}>
                    <LoginPage onLayout={onLayoutRootView} />
                </QueryClientProvider>
            </UserDataProvider>
        </>
    );
}

I'm thinking I use the context hook too early on, when I check the type of the dispatch function here it says it's [Function dispatch], and where it works it's [Function bound dispatchReducerAction].

I think the problem might come from me trying to call useContext before the contextprovider could render, but even when I put the block with using the dispatch action in the onLayoutRootView part, it didn't work.