Hello, @Pabi Makgopa ! While it's recommended that you take AZ-900 before AZ-104, it's not required. I'll explain below.
Do I need to take AZ-900 or any other prerequisites for AZ-104?
There are 3 Azure certifications at the fundamentals level: AZ-900 (Azure Fundamentals), DP-900 (Azure Data Fundamentals), and AI-900 (Azure AI Fundamentals). All of these fundamentals courses are recommended for additional certifications however they are not required.
The recommended path for AZ-104 is to take AZ-900, however you can jump directly to AZ-104 if you already feel you understand the basics of Azure (and with a DP-900 certification under your belt, that could very well be the case).
Here is a certification roadmap made by K21 Academy that makes this a bit clearer (note that dotted lines are optional while solid lines are required):
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