The Partner Learner Journey for AEM Developer refers to "AEM Challenges" - where can I find those challenges?

The challenges are linked from the Learner Journey PDF on the Solution Partner Portal Experience Manager Training page https://solutionpartners.adobe.com/home/hp/learn/training/aem_training/aem_ondemand.html

The challenges and on-demand training content are available to any partner whose company is a member of the Solution Partner Program.

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