It is a common problem when somebody uses a bunch of tags but their post doesn’t get promoted at all. So the reasons for that might be the following:
Too many likes and followers, excessive activity may seem suspicious to the moderators and your account might get a shadowban;
Adding the same tags under each post;
Complaints from other users;
Sanctions for using third-party programs and web services.
So beware of all these potential problems, utilize different tags, don’t spam, don’t use promotion apps and web services, don’t overuse hashtags, and be friendly to other users.