Hello,
I used the Study Guide from Apple and turned the sample questions into a flash card deck available at this link:
https://www.brainscape.com/p/4IWFX-LH-CLKGD
For reference, the study guide can be found at this link:
https://training.apple.com/content/dam/appletraining/us/en/2023/documents/Apple%20Device%20Support%20Exam%20Prep%20Guide.pdf
I plan on creating more content on my own as time allows for it.