The IBO released several example IAs (with moderator comments) for you to gauge what is expected of you.
Here are a dozen official graded example IAs from the IBO.
DGS students will be given access to all previous years’ IAs (including those moderated by the IBO). These examples are the property of the students that created them. They are published only as examples for reference, not to be taken as ‘explicit examples of what you have to do to get a 7’. One of the most difficult things is how to judge complexity and ingenuity in Part C. In the previous specification of this course, there was a document that floated around to help teachers judge these things. Although it does not apply anymore, it might give you a hint as what the moderators are looking for (if anything!)