You see, it completely depends on the requirements of the destination university
Some orals are only important to them, some consider sub scores and write this in detail on their website and the best thing is to check the website of the universities you are interested in.
But overall, you have a chance with this 5.5
Most of those who read Oral B2 (6.5-6) say that every task should not be below 5.5.
The higher the oral score, the higher the score of the tasks
Finally, there was a university that matched yours, but if you had a problem with a task, be sure to email them and they will guide you.
Maybe they will accept you, but in competition with other applicants, your chances will be lower, but if you have a strong portfolio and resume, you can compete.
Another point is that usually the programs whose practical aspects are higher than the research axes are less sensitive to the language score.
Be careful about taking a single task, I saw that some universities don’t accept it. First, check the conditions of the destination university, then pay.
Regarding your general question, which task should you improve, I think speaking, if you have 6.5, spend an hour a day practicing repetitive questions and ask someone who is fluent in the language and familiar with IELTS to prepare you for the test every day. Let him ask you common questions and take your objections. In this way, you will make good progress for speaking in a short time and you can focus the rest of your time on the same reading.
