Are there any "common topics" in the Speaking test?
There is no such thing as a list of "common topics" that you might get a Speaking test. In other words, the exam writers are constantly thinking of new topics to use to make questions for the Speaking test.
The only sense in which topics are "common" is that you never need to have any specialised knowledge to answer the questions.
Trying to prepare for the Speaking test by working on a list of topics is not an effective approach because it is absolutely impossible to guess what questions (or topics) you will get.
Instead, here is a much better way to prepare:
Part 1
The questions are about about everyday life.
You will definitely be asked to talk about now, before now and after now.
Part 2
Don't rely on the bullet points on the cue card. Instead, practice using Chris' unique Part 2 strategy in Module 4 of the Speaking Academy course.
Part 3
The examiner wants to see if you can discuss abstract ideas at length. Doing so requires a well-developed vocabulary and control of complex grammatical structures.
There are certain common types of questions you should expect. Chris goes over these in Module 5 in the Speaking Academy course.