Hello Florian,
Based on the info that you found in this Resource Center article, you can have up to 30 secondary statues active for each primary status. I'm not aware of any configuration in the Org that you can make to change this limit. I would recommend submitting an Idea in the Product Ideas Lab if you would like to see this added as a new feature to Genesys Cloud.
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Jason Kleitz
Online Community Manager/Moderator
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