Here is a list of useful resources to help you pass the AZ-204 Developing Solutions for Microsoft Azure exam

John Savill has some really good videos about Azure on YouTube
Azure Developer Associate (AZ-204) — Full Course Pass the Exam! by Andrew Brown free, youtube, full course.

Exam AZ-204 prep videos by Microsoft Learn free, recap
Course Course AZ-204T00-A: Develop Solutions for Microsoft Azure by Microsoft Learn free, official, full course

Labs and Demos by Microsoft Learn and GitHub repo free, hands-on
Practice Assessment for Exam AZ-204: Developing Solutions for Microsoft Azure by Microsoft Learn free, practice tests

Practice Tests by whizlabs paid, practice tests, pretty close to the real exam
AZ-204 Developing Solutions for Microsoft Azure by Scott Duffy paid, udemy