The application for a patent for utility model has been filed for a year and a half, and there is no conclusion yet. Is the patent company cheating?

A year and a half may be a bit long, but last year the audit was extremely strict. In order to crack down on junk patents, the application is strict now, and the utility model will also issue review opinions. Your agency may be responding to the review opinions, usually once every two months, so the deadline may be extended for this reason. Sometimes the reply is not timely, and the time is extended. It is recommended to communicate with your institution and ask whether it issues review opinions.