If there are more people applying for double degrees, it should actually happen every year, but sometimes it will change because of the teachers or the number of applicants. You can ask the relevant departments about this.
In fact, I personally think that if you like that major very much and want to develop in related fields, you can actually consider changing your major. If your school has this policy, do you think you will spend two years studying this major like others do for four years (double degrees are usually from the next semester of sophomore year to the last semester of senior year, and classes are only held on weekends)?
Of course, if you just want to learn more knowledge and help your future professional development, I suggest that you can still take the exam, but it won't be your bargaining chip in finding a job, but at least you will improve your personal ability and comprehensive quality by learning knowledge.
I'm not from your school, so I don't know the specific information. I suggest you go to your school's website, the relevant pages of the academic affairs office to find relevant information, or consult the academic affairs office in the department.
I hope I can help you. Hmm. How interesting