Question about emitting productList in a Stream without using yield

const stream = Stream.async((emit: StreamEmit.Emit<never, never, Readonly<number[]>, void>) => {
    majorCategoryUrls.forEach((majorCategoryUrl) => {
        const proudctList = pipe(
            Effect.succeed(majorCategoryUrl),
            Effect.flatMap(fetchProductList),
            Effect.flatMap(parseProductList),
            Effect.tap((a) => {
                if (a.length === 0) return Effect.fail(new ParseAllJsonError());
                else return Effect.unit;
            })
        );
        emit(proudctList);
    });
});