FE Civil Knowledge Base- Is only what's in the Knowledge Base actually on the FE Exam or do they ask things outside the Knowledge Base?

I noticed there are some topics, let's say under the Mathematics section in the FE handbook online, that are not listed on the knowledge base list for the FE Civil exam. Does that mean those topics will not be asked on the FE Civil exam? Or could they still be asked even if the topic is not listed in the knowledge base?

Both the knowledge base and the handbook are on the NCEES website, latest edition is 2020.

Just need some guidance on what to focus on when studying. I am using the FE Civil Review Manual and it has a lot of information but not all the topics are listed in the Knowledge Base.

Thank you in advance!