Where does the topics for Toefl integrated essay appear?

I am trying to submit toefl integrated writing essays. But when I choose the option it does not show any topic or any lecture to hear about. Please guide me how to use the tool.

Thanks in advance!

Thank you for your response. Since there are many who have submitted essays, is there a source where I can refer the topics?

Also, I am facing similar issue with speaking Q3, 4, 5. The topics is not mentioned in the prompt. Appreciate your help.

Thanks again!