According to the document: Uninstall Customer Insights - Dynamics 365 Customer Insights | Microsoft Learn

 The uninstall command releases your Dynamics 365 license and disconnects the Customer Insights - Journeys services. If you'd also like to remove all of the related solutions from your instance, you must manually delete them in the order. However, it is very time consuming to manually delete all the solutions in order as there will be dependencies. it would be more feasible if there is an option to remove the solutions in a more effective was without manually deleting the solutions in the order.