Cloudflare Pages Function CORS error

import { checkStoreSupportCode } from '../helpers/pocketbaseApi';

export function onRequestOptions() {
    return new Response(null, {
        status: 204,
        headers: {
            'content-type': 'application/json;charset=UTF-8',
            'Access-Control-Allow-Origin': '*',
            'Access-Control-Allow-Methods': 'GET, HEAD, POST, OPTIONS',
            'Access-Control-Allow-Headers': '*',
        },
    });
}

export async function onRequest({ request, env }) {
    if (request.method !== 'POST') {
        return new Response('Method not allowed', { status: 405 });
    }

    const { supportCode } = await request.json();

    if (!supportCode) {
        return new Response('Missing support code', { status: 400 });
    }

    try {
        const { status, error, storeHash } = await checkStoreSupportCode(supportCode, env);
        if (error) {
            return new Response(JSON.stringify({ status, error }));
        }
        return new Response(JSON.stringify({ status, storeHash }));
    } catch (err) {
        console.log(err);
        return new Response(JSON.stringify({ status: 'error', error: 'An unknown error occured' }));
    }
}