Google has automatic filters that hide your reviews so only you can see them. There are a few reasons why your Google Maps reviews might not be showing publicly:
Reviews can be rejected for violating Google's review policies.
Google can hide reviews for a variety of reasons, such as if they are reported by other users or if they are about a place that has been closed.
The content of the review: Does it contain offensive or off-topic content.
The account that left the review: Does the Google account have any history of suspicious behaviour?
The place itself: Has there been uncharacteristic activity — such as an abundance of reviews over a short period of time? Has it recently gotten attention in the news or on social media that would motivate people to leave fraudulent reviews?
If you believe your review is not breaking any rules then please write your issue here in this official Local Guides community thread.