@Martine677 In spite of all these guests on this thread claiming Airbnb removes bad reviews, that is simply not true. Hosts have a virtually impossible time trying to get even a review which is obviously full of lies (as evidenced that the host has 50 5* reviews and glowing written reviews) removed.
The only time they will will agree to remove a review is if it contravenes their review guidelines, i.e. is discriminatory, profane, mentions Airbnb involvement in a dispute, etc. and you can read their review TOS online to see exactly what those criteria are.
What is true is that Airbnb has constant tech issues which can cause this type of thing.
Also, reviews are not published in chronological order, so in order to make certain that your review hasn't been published, you have to scroll down through all the reviews, click on "Read more reviews"- you could find yours buried way down.
Your review would only be published within 24 hours if the host had also left a review. Reviews are published after both parties have submitted one, or if only one party does, it will be published 14 days after check-out.