Hello @elhacene welcome to the Local Guides Connect community!
Do I understand correctly, the total number of views of reviews has decreased, while the the total number of reviews stayed the same or increased?
First, I suggest to set your Map profile as not restricted, so we can see your published reviews and media and compare the number of posted to those being published.
All posts, i.e. reviews, photos and videos, are checked by an AI filter not only for obeying rules, but also to prevent SPAM and false information. If there is only a little doubt for the latter, the post is not published. Unfortunately, Google never tells us about that. The check is not only done immediately after uploading, but can also happen at later times, which would result in decreasing number of views.
Another reason, why a review becomes hidden after some time and after getting many views, happens when the place is deleted. Usually, we get a notification for that, but some local guides reported never having seen such a mail.
I recommend reading this series of articles How to Get In and Out of Trouble: The Main post and let us know, if you have questions.