Up to January 1st 2022 the required language level for the Civic Integration Exam is A2. For that you need 4 modules of 5 weeks, so 20 weeks.
The optional exam training is another 5 weeks.
After January 1st 2022 the required language level for the Civic Integration Exam is B1. You have to study twice as long: 8 modules of 5 weeks, so 40 weeks. The optional exam module of 5 weeks gives you a good chance to pass all the parts of the exam in one attempt.
The advantage of level B1 is that it really helps you in your Dutch life.