Is it possible to extend the duration of the Salesforce CDP sandbox assigned for exercises/labs - For those partners who may be going through the course, the CDP sandbox was provisioned for a month as part of the Partner Learning Camp course Salesforce CDP.
In some situations, the default 30-day expiration is too short. So you can request an extension for your trial period.
Only your Account Executive can extend your org's Trial period. If you've reviewed all relevant documentation and would like to request this limit increase, contact your Account Executive.
For more clarification refer this extend the salesforce Org