Q: unable to write a review of an app

What happens when you try? Is it happening with all apps? -AJ

yes it is... it doesn't show the review or rating that i've made

That's normal, you won't see your own reviews.

See if it shows here: https://support.apple.com/en-us/HT202363

-AJ

When did you post the review, it can sometimes take up to a few days for your review to appear in the reviews list.

What was the app you reviewed and what did you write in that review, I can check if I am able to see it.

Also please mention your type of Apple Store (related to your location, eg. U.S. App Store, British App Store, German App Store).