The allocation of additional variables is dependant on the Adobe Contract. This is only available for Adobe Standard and Adobe Premium Product.
Can you please check with Adobe Account Manager if your Adobe Contract is not a 'Point Product'?
In case this is Standard or Premium, please note that these additional variables can only be used directly if you are using AppMeasurement setup with version 1.4 or above.
For the legacy setup using H. versions of code or older AppMeasurement, this can only be done using context data variables which can in turn pass the value to events (So, you will have to use Processing Rules to map the same)
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