A/an/the IELTS Test/ exam

I searched on the internet, I have found that most the results show the term "the IELTS test" to talk about this kind of test in general, not a specific test.

Here are some examples:

1. How to pass the IELTS test/exam?

Can I rewrite like this with the same meaning?

(1A) How to pass ∅ IELTS tests/exams?

(1B) How to pass an IELTS test/exam?

2. The IELTS test is long. It takes 2 hours and 40 mins to do the test.

Can I rewrite like this with the same meaning?

(2A) An IELTS test is long. It takes 2 hours and 40 mins to do the test.

3. The IELTS exam is the International English Language Testing System test taken to prove your IELTS proficiency.

Can I rewrite like this with the same meaning?

(3A) IELTS exams are the International English Language Testing System tests taken to prove your IELTS proficiency.

Yes, all of your sentences are correct and natural. They all refer to specific instances of the test, rather than the test as a general concept.